{"title":"Tumbled stones","description":"\u003cp\u003eTumbled stones are mineral fragments rounded in a lapidary tumbler, a convenient format to carry in your pocket, give as a gift, or collect. In this collection, we bring together tumbled stones in different minerals, sizes, and colors. Product sheets are offered per unit or in bulk; each one indicates the mineral, the size range, and shows photographs of the pieces.\u003c\/p\u003e","products":[{"product_id":"rodados-de-lapislazuli","title":"Tumbled Lapis Lazuli","description":"\u003cp\u003eTumbled lapis lazuli from Afghanistan, 25-34 mm, with the characteristic ultramarine blue of Sar-e-Sang flecked with native golden pyrite and white calcite veins. Each piece varies in pyrite distribution and blue intensity.\u003c\/p\u003e\n\n\u003ch2\u003ePiece details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eLapis Lazuli (polymineralic rock: lazurite, pyrite, calcite)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003e25-34 mm, approx. weight 17-25 g\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSemi-polished\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e5-6 Mohs (dominant lazurite)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eAfghanistan — Sar-e-Sang basin, Badakhshan\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece type\u003c\/th\u003e\n\n\u003ctd\u003eIndividual selection; natural variation in color and pyrite\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThis specific piece\u003c\/h2\u003e\n\u003cp\u003eSar-e-Sang lapis lazuli has a higher lazurite concentration than other deposits, resulting in a deeper, more uniform blue. Pyrite appears as scattered golden flecks — the higher the proportion, the more intense the contrast. The white calcite veins are co-genetic and natural: in gemological tradition, they are the hallmark of genuine lapis lazuli versus imitations.\u003c\/p\u003e\n\u003cp\u003eThe tumbled finish leaves the surface semi-textured, ideal for collection or as a color reference in jewelry projects before choosing the cut shape.\u003c\/p\u003e\n\n\u003ch2\u003eWhat setting it works for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBezel setting (925 silver)\u003c\/strong\u003e — With a hardness of 5-6 Mohs, we recommend a closed bezel setting to protect the natural edges of the tumbled stone.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — The irregular profile of the tumbled stone adds character to the piece wrapped in silver or copper wire.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLapidary collection\u003c\/strong\u003e — Mineralogical reference for the Badakhshan variety.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eLapis lazuli in lapidary tradition\u003c\/h2\u003e\n\u003cp\u003eThe Sar-e-Sang mines have been in operation for over six thousand years. The ultramarine blue extracted from ground lapis lazuli was the most valuable pigment in Europe during the Renaissance — Michelangelo reserved it for the Virgin's robes. In crystal tradition, lapis lazuli is associated with wisdom and honest communication: the stone of those who speak their mind with clarity and conviction.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine lapis lazuli\u003c\/h2\u003e\n\u003cp\u003eAuthentic lapis lazuli always has visible pyrite under magnification (golden metallic flecks, never glitter), white calcite veins, and high tactile density. Dyed blue jasper has uniform color without pyrite. Sodalite has a grayer blue with more white veins. Azurite has a vitreous luster and visible crystalline structure on the edges.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhere does this lapis lazuli come from?\u003c\/h3\u003e\n\u003cp\u003eFrom the Sar-e-Sang deposit (Badakhshan, Afghanistan), the most historically recognized deposit. No detectable treatment; the statement is based on lapidary observation, the piece does not include formal gemological certification.\u003c\/p\u003e\n\u003ch3\u003eIs it suitable for a ring setting?\u003c\/h3\u003e\n\u003cp\u003eWith a hardness of 5-6 Mohs, we recommend a pendant or earrings in a closed bezel. In a ring, it would be vulnerable to scratches with daily wear.\u003c\/p\u003e\n\u003ch3\u003eIs it color treated?\u003c\/h3\u003e\n\u003cp\u003eNo. The blue is natural to lazurite; no dyes or resins. Pyrite and calcite are minerals present in the original deposit.\u003c\/p\u003e\n\u003ch3\u003eAre all pieces the same?\u003c\/h3\u003e\n\u003cp\u003eNo. They are natural tumbled stones with individual variation in blue intensity, pyrite proportion, and calcite veins. Dimensions 25-34 mm with a tolerance of ±0.5 mm.\u003c\/p\u003e\n\u003ch3\u003eHow do you care for it?\u003c\/h3\u003e\n\u003cp\u003eAvoid prolonged water exposure and chemicals — lapis lazuli is porous and can absorb oils and soaps. See \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ecare guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eSee also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/todas-las-piedras\"\u003eall stones\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40333896745003,"sku":"","price":4.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/1x-tumbled-lapis-lazuli-959039.webp?v=1699531182"},{"product_id":"3x-rodados-de-amazonita","title":"3x Amazonite Tumbled Stones","description":"\u003cp\u003eLot of 3 amazonite tumbled stones in natural blue-green, with the characteristic white veins typical of microcline feldspar. Each piece varies in color intensity and vein distribution; approximate measurements 40-55 mm. Selected lapidary stock.\u003c\/p\u003e\n\n\u003ch2\u003eLot Details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eAmazonite (microcline, variety of potassium feldspar)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eContents\u003c\/th\u003e\n\n\u003ctd\u003e3 tumbled stones per order\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eApprox. 40-55 mm (natural variation between pieces)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSemi-polished\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e6-6.5 Mohs\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eMaterial acquired from a wholesale lapidary market\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eNo treatment\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThis specific piece\u003c\/h2\u003e\n\u003cp\u003eThe blue-green color of amazonite comes from traces of lead and water trapped in the feldspar's crystal lattice. The intensity varies from bright turquoise to medium green with gray, and no two pieces are identical. The white veins are cogenetic albite feldspar — they are not impurities but the natural signature of the species.\u003c\/p\u003e\n\u003cp\u003eIn tumbled form, amazonite displays its nuances without the homogenization of workshop polishing. Ideal for those who want to see the mineral as it is before choosing how to mount it.\u003c\/p\u003e\n\n\u003ch2\u003eWhat setting it works for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBezel setting (925 silver or other precious metals)\u003c\/strong\u003e — Hardness 6-6.5 Mohs: suitable for closed bezel setting. The tumbled shape gives an organic result very different from a standard cabochon.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — The semi-matte surface of the tumbled stone grips silver or copper wire well; the result is a piece with an authentic mineral look.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollection and decoration\u003c\/strong\u003e — The blue-green complements dark minerals like tourmaline or lapis lazuli in decorative compositions.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eAmazonite in lapidary tradition\u003c\/h2\u003e\n\u003cp\u003eDespite its name, amazonite does not come from the Amazon River — the popular denomination was established in the 19th century from Brazilian deposits that later turned out to be another variety of feldspar. The most prized deposits are in Colorado (USA), Virginia, and Russia. In crystal tradition, amazonite is associated with clear communication, confidence, and the ability to speak from serenity.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine amazonite\u003c\/h2\u003e\n\u003cp\u003eAuthentic amazonite has a matte blue-green color with white albite veins visible under magnification. Turquoise has greater hardness and a different structure under a microscope. Stained glass has a vitreous luster without veins and feels colder to the touch. Amazonite always has some translucency at the edges of the tumbled stone when illuminated with a flashlight.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat exactly will I receive?\u003c\/h3\u003e\n\u003cp\u003e3 amazonite tumbled stones selected from the same lot, with natural variation in color and intensity between pieces. Dimensions approx. 40-55 mm with ±0.5 mm tolerance as they are natural pieces.\u003c\/p\u003e\n\u003ch3\u003eAre they treated?\u003c\/h3\u003e\n\u003cp\u003eNo detectable treatment. The blue-green color is natural to microcline. The statement is based on lapidary observation; it does not include formal gemological certification.\u003c\/p\u003e\n\u003ch3\u003eIs it suitable for ring settings?\u003c\/h3\u003e\n\u003cp\u003eWith 6-6.5 Mohs, it is possible; we recommend a pendant or earrings in a closed bezel for daily use. For rings, avoid direct impacts.\u003c\/p\u003e\n\u003ch3\u003eAre all 3 pieces the same size?\u003c\/h3\u003e\n\u003cp\u003eSimilar, but not identical — they are natural tumbled stones, not industrially calibrated. Estimated variation ±3-5 mm between pieces from the same lot.\u003c\/p\u003e\n\u003ch3\u003eHow to care for it?\u003c\/h3\u003e\n\u003cp\u003eNo detergents or acids. Clean with a dry or slightly damp cloth. See \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ecare guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eSee also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1 piece","offer_id":40373054439467,"sku":"","price":2.0,"currency_code":"EUR","in_stock":false},{"title":"3 pieces","offer_id":40333896777771,"sku":"","price":4.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/3x-tumbled-amazonite-crystals-208458.jpg?v=1699553696"},{"product_id":"turmalina-negra-rodados-grandes","title":"Large Tumbled Black Tourmaline","description":"\u003cp\u003eLarge tumbled black tourmaline (schorl variety) from Brazil. Size between 40 and 58 mm, weight between 44 and 74 grams: volumetric format for hand stones, large pocket stones, or as a central piece in large format macramé.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eBlack Tourmaline (Schorl) — borosilicate from the tourmaline group\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eOpaque intense black with vitreous luster on polished surfaces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e40-58 mm diameter; 44-74 g weight per piece\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; \"river pebble\" finish with no sharp edges\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polished, characteristic of tumbled stones\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7-7.5 Mohs — very scratch resistant; the tumbled format neutralizes the fragility of raw crystal\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil (Minas Gerais)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The black color comes from the native iron and manganese in the mineral (schorl)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece Type\u003c\/th\u003e\n\n\u003ctd\u003eUnique shape for each tumbled stone; intuitive selection within the size range\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy the Tumbled Format\u003c\/h2\u003e\n\u003cp\u003eRaw tourmaline crystal presents in prisms with marked cleavage planes; although hardness is high, points are prone to breaking with regular handling. The tumbled finish eliminates these fragile points, leaving a continuous surface resistant to daily use — the most practical version to carry by hand or as a large format centerpiece.\u003c\/p\u003e\n\n\u003ch2\u003eWhat This Format is Good For\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLarge Format Macramé\u003c\/strong\u003e — the 44-74 g weight is ideal for statement pendants with thick waxed thread; the ergonomic shape can be tied directly without a cap.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire Wrap\u003c\/strong\u003e — high hardness allows for thick gauges (1-1.5 mm) without marring the polished surface.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket Stone \/ Hand Stone\u003c\/strong\u003e — the 40-58 mm size fits in the palm like a worry stone; associated with protection and grounding.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDecorative Compositions and Altars\u003c\/strong\u003e — the visual mass and intense black create a striking focal point against light surfaces.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eBlack Tourmaline in Tradition\u003c\/h2\u003e\n\u003cp\u003eTourmalines are piezoelectric and pyroelectric: when rubbed or heated, they generate a weak electrical charge. 18th-century Dutch sailors used it to clean ash from pipes, taking advantage of this electrical property (\"aschentrekker,\" ash-puller). In crystal tradition, it is associated with personal protection and grounding.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhy the tumbled format and not raw crystal?\u003c\/h3\u003e\n\u003cp\u003eTumbling neutralizes the fragile points of the prism and leaves a continuous, resistant surface for carrying in a pocket or as a hand stone.\u003c\/p\u003e\n\u003ch3\u003eHow much does each tumbled stone weigh?\u003c\/h3\u003e\n\u003cp\u003eBetween 44 and 74 grams depending on size. The weight is notable due to tourmaline's high density (3.0-3.2 g\/cm³).\u003c\/p\u003e\n\u003ch3\u003eIs it really piezoelectric?\u003c\/h3\u003e\n\u003cp\u003eYes, all tourmalines are piezoelectric and pyroelectric — they generate a weak charge with mechanical pressure or temperature changes, measurable with instruments.\u003c\/p\u003e\n\u003ch3\u003eHow do you care for it?\u003c\/h3\u003e\n\u003cp\u003eClean with a soft, slightly damp cloth. Scratch-resistant in normal use; avoid sudden impacts on the edges. More in \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ejewelry care\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eMore about black tourmaline: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/turmalina-negra\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/piedrasdemeditacion\"\u003emeditation stones\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Large-40-58mm","offer_id":40333899595819,"sku":"","price":6.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/large-black-tourmaline-tumbles-737687.jpg?v=1699550603"},{"product_id":"rodados-cuarzo-rosa-lote-2","title":"Tumbled Rose Quartz · Lot of 2","description":"\u003cp\u003eGenuine rose quartz tumbled stones in a 2-piece lot — pale pink tones with the characteristic translucency of the Brazilian variety. Mirror-polished surface, smooth to the touch, pocket-sized. Each pair varies slightly in tone and shape depending on the original batch.\u003c\/p\u003e\n\n\u003ch2\u003eItem details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eRose Quartz (macrocrystalline quartz with dumortierite or rutile inclusions that produce the color)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled — spherical-irregular polished surface\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eApprox. dimensions\u003c\/th\u003e\n\n\u003ctd\u003e2-3 cm diameter (varies per piece)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eMirror polished\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil (world's leading producer of rose quartz)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eNo detectable treatment. Color due to microscopic dumortierite or rutile inclusions.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eQuantity\u003c\/th\u003e\n\n\u003ctd\u003eLot of 2 pieces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eRose Quartz\u003c\/h2\u003e\n\u003cp\u003eRose quartz is the most well-known variety of macrocrystalline quartz. Its color — from pale to intense pink — comes from microscopic inclusions of dumortierite or rutile fibers distributed throughout the crystal mass. Brazil is the world's largest producer; the deposits in Minas Gerais yield highly translucent pieces. Unlike rose quartz from Madagascar — which tends to be more intense and with greater clarity — Brazilian rose quartz is more milky and uniform.\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, rose quartz is associated with heart energy and tenderness. It is one of the most commonly used minerals for pocket amulets since antiquity.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eSymbolic properties belong to cultural traditions. They are shared for educational purposes, not as medical advice.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eDoes the color fade over time?\u003c\/h3\u003e\n\u003cp\u003eRose quartz exposed to prolonged direct sunlight may lose color intensity slightly. Store in a place without direct sun exposure.\u003c\/p\u003e\n\u003ch3\u003eCan I choose the pieces in the lot?\u003c\/h3\u003e\n\u003cp\u003eThe pair is sent randomly. If you have a preference for tone (more intense or paler pink), please write to us and we will manage it.\u003c\/p\u003e\n\u003ch3\u003eAre these pieces genuine or synthetic?\u003c\/h3\u003e\n\u003cp\u003eThey are natural rose quartz with no detectable treatment. Synthetic rose quartz has an absolutely uniform color and a much lower price per carat — easy to distinguish.\u003c\/p\u003e\n\u003ch3\u003eWhat are they used for in jewelry?\u003c\/h3\u003e\n\u003cp\u003eFor pendants with a drilled bail, macrame pieces, crystal grids, or as a pocket stone. The size (2-3 cm) is ideal for all these uses.\u003c\/p\u003e\n\u003ch3\u003eHow are they cared for?\u003c\/h3\u003e\n\u003cp\u003eWash with lukewarm water and neutral soap if necessary. Avoid prolonged direct sun exposure. More at \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003eJewelry Care\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eMore about the mineral: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/cuarzo-rosa-propiedades-significado-y-usos\"\u003erose quartz properties\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled stones collection\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/todas-las-piedras\"\u003eall stones\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1x Piedra","offer_id":40333899857963,"sku":"","price":2.0,"currency_code":"EUR","in_stock":true},{"title":"2x piedras","offer_id":40333899890731,"sku":"","price":3.8,"currency_code":"EUR","in_stock":false},{"title":"5x Piedras","offer_id":40333899923499,"sku":"","price":8.8,"currency_code":"EUR","in_stock":false},{"title":"10x Piedras","offer_id":40333899956267,"sku":"","price":14.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/il_fullxfull.3116983993_gqgg.jpg?v=1660070864"},{"product_id":"turmalina-negra-rodados-grandes-xl","title":"Black Tourmaline Tumbled Stones Large XL","description":"\u003cp\u003eXL tumbled black tourmaline (Schorl) in XL format, 64-99 mm, available in 5 pieces with individual measurements: A (99×52×43 mm), B (81×58×29 mm), C (80×50×53 mm), D (64×56×30 mm) and E (80×73×38 mm). Complex borosilicate polished in a lapidary tumbler, from Brazil.\u003c\/p\u003e\n\n\u003ch2\u003ePiece details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eBlack Tourmaline — Schorl (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eA: 99×52×43 mm · B: 81×58×29 mm · C: 80×50×53 mm · D: 64×56×30 mm · E: 80×73×38 mm · ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and back\u003c\/th\u003e\n\n\u003ctd\u003eXL tumbled, freeform, irregular convex back\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eTumbled polished (satin with matte areas characteristic of the mineral)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7-7.5 Mohs — very wear-resistant; suitable for intensive use\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece type\u003c\/th\u003e\n\n\u003ctd\u003e5 options with individual measurements (select when ordering)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThese specific pieces\u003c\/h2\u003e\n\u003cp\u003eXL black tourmaline has a presence that standard tumbled stones cannot match: the mass is sufficient to feel the weight in the hand (the larger pieces exceed 200 g), and the polished surface reveals a black that is not entirely homogeneous —the prismatic structure of Schorl leaves some areas with a livelier shine and others with a more matte finish, depending on the orientation of the prisms with respect to the polished surface.\u003c\/p\u003e\n\u003cp\u003eThe five sizes correspond to five individual polished crystals, not a statistical range: the exact measurements indicated are those of the specific piece available in each variant.\u003c\/p\u003e\n\n\u003ch2\u003eHow black tourmaline is formed\u003c\/h2\u003e\n\u003cp\u003eSchorl is the most common variety of the tourmaline family and the most abundant tourmaline group mineral in the Earth's crust. It forms in granitic pegmatites —masses of very coarse-grained igneous rock that crystallize slowly at great depth— where slow cooling allows for the growth of large crystals.\u003c\/p\u003e\n\n\u003ch2\u003eUses of XL black tourmaline tumbled stones\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollection and decoration\u003c\/strong\u003e — the jumbo size makes them display pieces with their own identity. The intense black creates an effective contrast with white or translucent minerals.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWorking palmstone\u003c\/strong\u003e — the weight and polished surface make these tumbled stones a high-quality tactile object; their mass allows them to gradually absorb heat from the hand.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWorkshop reference\u003c\/strong\u003e — crystals of this magnitude are useful for studying the prismatic structure of tourmaline before planning cuts or carvings in smaller material.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eBlack tourmaline in lapidary tradition\u003c\/h2\u003e\n\u003cp\u003eSchorl is the most abundant tourmaline and historically has had less gemological value due to its opaque color, in contrast to green tourmaline (verdelite) or bicolor (watermelon).\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, black tourmaline is one of the minerals most associated with protection and grounding. It is considered a stone of boundaries and a protective field, used in geobiology practices by placing pieces in the corners of rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine black tourmaline\u003c\/h2\u003e\n\u003cp\u003eGenuine black tourmaline has a visible prismatic structure inside under glancing light: small striations parallel to the original crystal axis that polishing smooths but does not completely eliminate. The black is not perfectly uniform throughout the piece —areas with higher iron density are darker.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eAre the indicated measurements exact for each variant?\u003c\/h3\u003e\u003cp\u003eYes. The measurements for each variant (A, B, C, D, E) correspond to the actual dimensions of that specific piece measured in the workshop. They are not ranges but individual measurements, with a tolerance of ±0.5 mm due to the nature of the manual measurement process.\u003c\/p\u003e\n\u003ch3\u003eHow much does each piece weigh?\u003c\/h3\u003e\u003cp\u003eThe weight varies between approx. 100 g (variant D) and more than 250 g (variant A) depending on the volume. If you need the exact weight, please contact us before placing your order.\u003c\/p\u003e\n\u003ch3\u003eIs it suitable for meditation palmstone?\u003c\/h3\u003e\u003cp\u003eYes. The size and weight of these pieces make them especially suitable for this use. The tumbled polished surface is smooth and the mineral gradually warms with the heat of the hand.\u003c\/p\u003e\n\n\u003cp\u003eMore about tourmaline: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/turmalina-negra\"\u003eproperties, meaning and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003elapidary cabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"A- 99x52x43mm","offer_id":40333900283947,"sku":"","price":36.7,"currency_code":"EUR","in_stock":false},{"title":"H- 81x58x29mm","offer_id":40333900316715,"sku":"","price":20.7,"currency_code":"EUR","in_stock":true},{"title":"C- 80x50x53mm","offer_id":40333900349483,"sku":"","price":30.5,"currency_code":"EUR","in_stock":true},{"title":"D- 64x56x30mm","offer_id":40333900382251,"sku":"","price":17.0,"currency_code":"EUR","in_stock":true},{"title":"E- 80x73x38mm","offer_id":40333900415019,"sku":"","price":35.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/large-black-tourmaline-tumbled-xl-157741.jpg?v=1699550637"},{"product_id":"malaquita-cristales-rodados","title":"Malachite Tumbled Stones","description":"\u003cp\u003eMalachite tumbles with concentric green banding patterns that distinguish it from any other mineral. Small (17-18 mm) or medium (24-32 mm) size, polished in a lapidary tumbler. Copper carbonate with a hardness of 3.5-4, for collection or careful wire wrapping.\u003c\/p\u003e\n\n\u003ch2\u003eItem details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eMalachite (basic copper carbonate, Cu₂(CO₃)(OH)₂)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eS: 17-18 mm · M: 24-32 × 17-21 mm · Freeform ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and back\u003c\/th\u003e\n\n\u003ctd\u003eTumbled, rounded freeform\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eTumbler polished (satin)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e3.5-4 Mohs — we recommend closed bezel setting if mounted in jewelry; avoid contact with hard surfaces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eMaterial acquired from a lapidary wholesale market\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eNo treatment\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eItem type\u003c\/th\u003e\n\n\u003ctd\u003eAvailable in 2 sizes (S and M)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThese specific tumbles\u003c\/h2\u003e\n\u003cp\u003eMalachite's banding pattern is its unmistakable visual signature: concentric green bands ranging from very light green to dark forest green, formed by successive episodes of copper carbonate precipitation in the same cavity. In these tumbles, the tumbler polish reveals the interior of the mineral: the bands that were concentric layers in the original crystal now appear as curves on the rounded surface, creating a unique design in each piece.\u003c\/p\u003e\n\u003cp\u003eThe hardness of 3.5-4 is the most relevant data for deciding the use of these tumbles: they are perfectly suitable for collection and for wire wrapping pendants, but require careful handling and are not suitable for rings without a protective bezel.\u003c\/p\u003e\n\n\u003ch2\u003eHow malachite forms\u003c\/h2\u003e\n\u003cp\u003eMalachite is a secondary mineral that forms in the oxidation zone of copper deposits. When copper-rich solutions circulate through cracks and cavities in the rock, copper carbonate precipitates in successive layers upon contact with carbonates in the host rock. Each layer records a pulse of the hydrothermal fluid; its color varies from light green (layers with higher OH content) to dark green (higher Cu concentration).\u003c\/p\u003e\n\n\u003ch2\u003eUses of malachite tumbles\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMineralogical collection\u003c\/strong\u003e — the green banding pattern is one of the most recognizable in mineralogy, with high aesthetic value.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrapping\u003c\/strong\u003e — the M size (24-32 mm) is suitable for wrapped pendants; the intense green contrasts well with silver or copper wire.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDecoration\u003c\/strong\u003e — on a mineralogical tray, it combines with azurite, turquoise, and chrysocolla due to the copper color family.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eMalachite in lapidary tradition\u003c\/h2\u003e\n\u003cp\u003eMalachite is one of the first copper minerals identified by Neolithic metallurgists as a copper ore. In ancient Egypt, it was ground as a green pigment for eye cosmetics and wall paintings.\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, malachite is associated with transformation, the heart, and protection. Its green color links it to growth and renewal.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine malachite\u003c\/h2\u003e\n\u003cp\u003eGenuine malachite shows irregular concentric bands with natural variations in width and curvature. Imitations in plastic or resin have perfectly regular and symmetrical bands. With diluted hydrochloric acid, genuine malachite reacts effervescently (CO₂); imitations do not react. Under a 10× magnifying glass, the real mineral shows a fibrous or massive texture characteristic of carbonate growth.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eIs malachite fragile?\u003c\/h3\u003e\u003cp\u003eWith a hardness of 3.5-4, malachite is softer than most lapidary minerals. It is suitable for collection, wire-wrapped pendants, and decoration, but requires care to avoid scratches. For ring mounting, we recommend a closed bezel setting that protects the edge of the piece.\u003c\/p\u003e\n\u003ch3\u003eIs malachite toxic?\u003c\/h3\u003e\u003cp\u003eMalachite in its compact polished state is safe for normal handling. Malachite dust (e.g., during carving) should not be inhaled as it contains copper. For use as a collection tumble or jewelry, the risk is negligible under normal conditions.\u003c\/p\u003e\n\n\u003cp\u003eMore about malachite: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/malaquita\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled minerals\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003elapidary cabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Small","offer_id":40424156495915,"sku":"","price":4.0,"currency_code":"EUR","in_stock":true},{"title":"Medium","offer_id":40418469216299,"sku":"","price":5.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/1x-malachite-tumbled-stones-603257.webp?v=1699531145"},{"product_id":"rodados-cuarzo-con-azufre","title":"Cuarzo con Azufre · Rodado","description":"\u003cp\u003eTumbled quartz with native sulfur inclusions of vivid yellow color. The sulfur, trapped in the quartz matrix during hydrothermal crystallization, produces that saturated yellow hue that distinguishes these tumbled stones within any mineralogical collection.\u003c\/p\u003e\n\n\u003ch2\u003ePiece Information\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eQuartz with native sulfur inclusions (SiO₂ + S)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eVariable · Freeform ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and Back\u003c\/th\u003e\n\n\u003ctd\u003eTumbled, rounded freeform\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eDrum polished (satin)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs (host quartz) — sulfur inclusions (Mohs 1.5-2.5) are internal unexposed soft spots\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBolivia\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece type\u003c\/th\u003e\n\n\u003ctd\u003eCollector's mineral — each tumbled stone varies in inclusion distribution\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThese Specific Tumbled Stones\u003c\/h2\u003e\n\u003cp\u003eThe yellow color of these tumbled stones does not come from the quartz itself but from the elemental sulfur (S) inclusions distributed throughout the crystal mass. Depending on the concentration and distribution of these inclusions, the yellow can be more uniform or may present lighter areas (pure quartz) and areas of greater color saturation. Each piece has its own color map.\u003c\/p\u003e\n\u003cp\u003eThe rarity of this mineral lies in the combination: native sulfur typically deposits in active low-temperature volcanic zones, and for it to be trapped within simultaneously growing quartz requires very specific geochemical conditions that are not frequently met.\u003c\/p\u003e\n\n\u003ch2\u003eHow Sulfur Quartz Forms\u003c\/h2\u003e\n\u003cp\u003eNative sulfur precipitates in low-temperature hydrothermal zones, typically near volcanic fumaroles or in saline deposits. In Bolivia, the evaporitic basins of the altiplano offer conditions where silica and sulfur coexist in solution.\u003c\/p\u003e\n\n\u003ch2\u003eUses of Tumbled Quartz with Sulfur\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMineralogical collection of unusual specimens\u003c\/strong\u003e — the quartz-sulfur combination is uncommon and appeals to collectors seeking minerals outside the usual catalog.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCarry stone\u003c\/strong\u003e — the size and weight of the tumbled stone are suitable for carrying in a pocket or transport bag.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eVisual reference for workshop\u003c\/strong\u003e — useful for studying the color behavior of inclusions in quartz before working with similar, higher-value pieces.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eSulfur in Lapidary and Cultural Tradition\u003c\/h2\u003e\n\u003cp\u003eElemental sulfur is one of the minerals with the longest presence in human history: its easy combustion and characteristic smell have associated it since antiquity with fire and volcanic underworlds. In medieval alchemy, it was one of the three fundamental principles —Sulphur, Mercurius, Salt— and represented the active principle, the inner fire.\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, sulfur is associated with energetic cleansing, transformation, and purifying fire. Quartz as a matrix adds the qualities of amplification and clarity.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to Recognize Genuine Sulfur Quartz\u003c\/h2\u003e\n\u003cp\u003eGenuine sulfur quartz has yellow distributed irregularly throughout the mass, with clearer areas of pure quartz between the sulfur concentrations. Under a 10× loupe, sulfur inclusions appear as yellow particles or clouds within transparent or translucent quartz. Imitations in yellow glass have a uniform and homogeneous color without this irregular distribution.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs the yellow color from the sulfur or the quartz?\u003c\/h3\u003e\u003cp\u003eFrom native sulfur trapped as physical inclusions within the quartz matrix. The quartz itself is colorless or translucent; the color comes from the elemental sulfur (S) particles distributed throughout the crystal mass.\u003c\/p\u003e\n\u003ch3\u003eCan the sulfur detach or be dangerous when handling the stone?\u003c\/h3\u003e\u003cp\u003eNot under normal conditions of use and handling. The sulfur inclusions are encapsulated within the hard quartz matrix (7 Mohs). No fumes or gases are released when handling the tumbled stone. Only in case of accidental fracture of the quartz could sulfur be exposed punctually, without risk in such small quantities.\u003c\/p\u003e\n\n\u003cp\u003eMore about quartz: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/cuarzo\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/minerales-en-bruto\"\u003erough minerals\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40333905264683,"sku":"","price":3.85,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/sulfur-quartz-tumble-stone-708489.jpg?v=1699547298"},{"product_id":"rodados-de-ametrino","title":"Ametrine Tumbled Stones","description":"\u003cp\u003eTumbled ametrine from Bolivia with the characteristic violet-gold bicolor zoning. The only mineral on the planet that combines amethyst and citrine in a single piece, from the Anahí mine—the only known natural ametrine deposit in the world.\u003c\/p\u003e\n\n\u003ch2\u003ePiece Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eAmetrine (bichrome quartz with Fe²⁺\/Fe³⁺ in distinct growth sectors)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eVariable · Freeform ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and Back\u003c\/th\u003e\n\n\u003ctd\u003eTumbled, rounded freeform\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eDrum polished (satin-gloss)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs — resistant to everyday use\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBolivia (Anahí Mine, Santa Cruz)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The bicolor zoning is natural due to differences in iron oxidation state in sectors of the same crystal.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eType of Piece\u003c\/th\u003e\n\n\u003ctd\u003eIndividual piece — each tumbled stone has its own proportion of violet and gold zones\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThese Specific Tumbled Stones\u003c\/h2\u003e\n\u003cp\u003eThe proportion between the violet and gold zones varies in each piece. Some tumbled stones show the transition as a sharp diagonal stripe; others present a more diffuse gradient. This variation is not a defect: it reflects the orientation in which the drum cut the original crystal with respect to the contact plane between the two oxidation sectors.\u003c\/p\u003e\n\u003cp\u003eDrum tumbling produces a particularly interesting finish on ametrine because continuous polishing reveals the color transition at different depths: the contact zone is visible on the surface; when rotating the piece under grazing light, its transparency allows for an intuition of the internal color distribution.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Ametrine Only Exists in Bolivia\u003c\/h2\u003e\n\u003cp\u003eAmetrine is the result of a very specific geological condition that has only been found naturally in the Anahí mine, in the department of Santa Cruz (Bolivia). During the growth of a quartz crystal, different parts of the same crystal were exposed to varying temperature and pressure conditions. In areas where iron partially oxidized to Fe³⁺, the quartz was colored violet (amethyst); in areas of slightly higher temperature where Fe²⁺ predominated, the color is yellow (citrine). The boundary between both zones can be abrupt or gradual depending on the speed of the condition change.\u003c\/p\u003e\n\n\u003ch2\u003eUses of Tumbled Ametrine\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMineralogical collection\u003c\/strong\u003e — one of the few natural bichrome gemstones in the world, with a single documented geographical origin.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the violet-gold color transition creates a very attractive visual effect in wrapped pendants; the piece \"tells its own story\" depending on how it is oriented.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eGift for collectors\u003c\/strong\u003e — the rarity of the Bolivian origin makes it a piece with narrative as well as aesthetic value.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eAmetrine in Lapidary Tradition\u003c\/h2\u003e\n\u003cp\u003eThe Anahí mine has a documented history since the 17th century: according to Jesuit chronicles, a Spanish conquistador received the mine as a dowry upon marrying Anahí, a Bolivian princess, and the first gemstones arrived in Europe during that period. The mine was commercially rediscovered in the 1970s, and since then Bolivia has been the only recognized world producer of natural ametrine.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eHow to Recognize Genuine Ametrine\u003c\/h2\u003e\n\u003cp\u003eGenuine ametrine has a color transition with natural variations in thickness and irregularities along the contact plane. Artificial or partially heated ametrine shows a uniform horizontal separation band without irregularities. Under a 10× loupe, genuine ametrine exhibits microinclusions typical of hydrothermal growth in both zones. Imitations in dyed glass have flat colors without the depth of quartz.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs ametrine dyed or treated?\u003c\/h3\u003e\u003cp\u003eNo. The bicolor zoning is a result of natural crystallization conditions in the Anahí mine, with no detectable subsequent treatment.\u003c\/p\u003e\n\u003ch3\u003eWhy does the color proportion vary between pieces?\u003c\/h3\u003e\u003cp\u003eThe proportion between the violet and gold zones depends on the angle at which the drum cut and rounded the stone.\u003c\/p\u003e\n\u003ch3\u003eIs it suitable for wire wrapping?\u003c\/h3\u003e\u003cp\u003eYes. Its hardness of 7 protects it from normal wear. The violet-gold color transition creates a highly sought-after visual effect.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40333910310955,"sku":"","price":4.7,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/1x-ametrine-tumbled-stone-422062.jpg?v=1699553945"},{"product_id":"rodados-de-crisocola-calidad-premium","title":"Premium Grade Chrysocolla Tumbles","description":"\u003cp\u003ePremium tumbled chrysocolla in a blue-green to intense turquoise hue, with black and brown veins from accompanying minerals. Size between 23 and 31 mm, weight between 12 and 18 grams. Unique pattern in each piece.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eChrysocolla (hydrated copper silicate) — usually mixed with quartz, malachite, and other secondary copper minerals\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eBlue-green to intense turquoise with black and brown veins; variable hues per piece\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e23-31 mm diameter; 12-18 g weight per piece\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; smoothly rounded surface\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polished characteristic of tumbled stones\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e2.5-3.5 Mohs in pure chrysocolla; up to 7 Mohs in areas with a siliceous matrix\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eSecondary copper deposits — main sources: Arizona (USA), Peru, Chile, D. R. Congo\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The blue-green color comes from native copper; no detectable plastic stabilization\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece Type\u003c\/th\u003e\n\n\u003ctd\u003eUnique pattern in each tumbled stone; intuitive selection with prioritization of color quality and veins\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy \"premium\" quality in chrysocolla\u003c\/h2\u003e\n\u003cp\u003eMuch of commercial chrysocolla is porous and sold stabilized with resin or dyed to unify the color. This selection prioritizes pieces with natural blue-green saturation without apparent stabilization, marked veins that show real geological composition, and sufficient hardness thanks to the present siliceous matrix.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is suitable for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — fine gauge (0.6-0.8 mm) and low tension; wraps that support the outline without pressing on the polished surface.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacramé\u003c\/strong\u003e — the weight (12-18 g) works for waxed cord pendants where adjustment is made by knots without direct tension on the stone.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone \/ meditation stone\u003c\/strong\u003e — compact format and comfortable weight; chrysocolla is associated with serene communication.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollecting\u003c\/strong\u003e — the blue-green with black veins is one of the most characteristic gradients in copper mineralogy.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eChrysocolla in tradition\u003c\/h2\u003e\n\u003cp\u003eDescribed by Theophrastus in the 4th century BC as \"gold glue\" (chrysos + kolla), used as a flux in gold soldering in ancient Greece. In crystal tradition, it is associated with tranquil communication and serene emotional expression.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs it the same stone as turquoise?\u003c\/h3\u003e\n\u003cp\u003eNo. Chrysocolla is a hydrated copper silicate; turquoise is a copper and aluminum phosphate. The color is similar, but the composition, hardness, and deposits are different.\u003c\/p\u003e\n\u003ch3\u003eWhy does the hardness vary so much in the same piece?\u003c\/h3\u003e\n\u003cp\u003eCommercial chrysocolla is mixed with quartz (7 Mohs), malachite, and other secondary minerals; areas with more quartz are harder.\u003c\/p\u003e\n\u003ch3\u003eDoes it work for everyday jewelry?\u003c\/h3\u003e\n\u003cp\u003eIt works well in wire-wrapped or macramé pendants and earrings. For everyday rings, we do not recommend it due to its low hardness.\u003c\/p\u003e\n\u003ch3\u003eHow is it cared for?\u003c\/h3\u003e\n\u003cp\u003eOnly a dry or very slightly damp cloth. Avoid chemicals, ultrasound, and prolonged intense sun. More at \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ejewelry care\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eMore about chrysocolla: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/crisocola\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/piedrasdemeditacion\"\u003emeditation stones\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40333911588907,"sku":"","price":8.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/premium-tumbled-chrysocolla-238601.jpg?v=1778868279"},{"product_id":"rodados-de-amatista-lote-de-2-piezas","title":"Tumbled Amethyst 2-Piece Lot","description":"\u003cp\u003eBrazilian amethyst tumbled stones, approx. 30 mm. Polished violet quartz in a lapidary tumbler with natural color due to native Fe³⁺. Available in packs of 2, 5, or 10 pieces for collection, gifts, or workshop practices.\u003c\/p\u003e\n\n\u003ch2\u003eItem Details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eAmethyst (violet quartz with Fe³⁺\/Mn — SiO₂)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eApprox. 30 mm · Free form ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and Back\u003c\/th\u003e\n\n\u003ctd\u003eTumbled, rounded free form\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eTumbled polished (satin)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs — resistant to daily use\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. Violet color from native Fe³⁺.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eItem Type\u003c\/th\u003e\n\n\u003ctd\u003eAvailable in packs of 2, 5, or 10 units\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eAbout these specific tumbled stones\u003c\/h2\u003e\n\u003cp\u003eBrazilian amethyst from Minas Gerais produces a medium-range violet, between soft lilac and medium purple, without the very dark tone of Uruguayan amethyst or the paleness of Zambian. In these tumbled stones, the color is uniform throughout the mass of the piece with slight variations in translucency towards the edges, where the tumbler has rounded the edges and the quartz is somewhat thinner.\u003c\/p\u003e\n\u003cp\u003eThe 30 mm size places them in a versatile range: enough mass to appreciate the color and the smooth feel of the polished quartz, compact enough to use them in batches without being bulky in a display tray.\u003c\/p\u003e\n\n\u003ch2\u003eHow amethyst is formed\u003c\/h2\u003e\n\u003cp\u003eAmethyst is quartz that incorporated trivalent iron ions (Fe³⁺) during its hydrothermal growth. The violet coloration is not uniformly distributed in the crystal: it is concentrated in growth zones parallel to the rhombohedron faces, which explains the color in sectors or bands that are visible when the piece is cut. Prolonged exposure to intense ultraviolet light can decolorize amethyst (Fe³⁺ is reduced to colorless Fe²⁺), which distinguishes it from violet glass, which does not change color with light.\u003c\/p\u003e\n\n\u003ch2\u003eUses for amethyst tumbled stones\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollection and decoration\u003c\/strong\u003e — the medium violet of Brazilian amethyst pairs well with selenite, rose quartz, and celestite in mineralogical compositions.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — hardness 7 and 30 mm size make it a solid material for pendants wrapped in silver or copper wire.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWorkshops\u003c\/strong\u003e — packs of 5 or 10 pieces are common in workshops for finishing practices or material selection.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eAmethyst in lapidary tradition\u003c\/h2\u003e\n\u003cp\u003eAmethyst is one of the most documented minerals in lapidary history across all continents. In Ancient Greece and Rome, it was carved into cups and set in royal jewelry.\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, amethyst is perhaps the mineral most associated with mental calm, intuition, and protection. Its violet hue links it with spirituality and meditation in virtually all cultures that knew it.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine amethyst\u003c\/h2\u003e\n\u003cp\u003eGenuine amethyst shows color distribution in sectors or zones under direct light, without perfect uniformity. Under a 10× loupe, quartz has characteristic fluid inclusions. Exposure to direct sunlight for hours can slightly decolorize the violet — glass imitations do not change color. Violet glass has a slightly different density and feel: it heats up and cools down faster than the stone.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs this amethyst heat-treated?\u003c\/h3\u003e\u003cp\u003eNo. The violet color is the result of native Fe³⁺ incorporated during crystallization, with no detectable subsequent heating. Statement based on lapidary observation; the piece does not include formal gemological certification.\u003c\/p\u003e\n\u003ch3\u003eDo all tumbled stones in the lot have the same violet hue?\u003c\/h3\u003e\u003cp\u003eNo. Variation in intensity between pieces in the same lot is normal and expected: it reflects local compositional differences within the deposit. The hue of the tumbled stones will vary within the natural violet-lilac range of Brazilian amethyst.\u003c\/p\u003e\n\u003ch3\u003eAre they suitable for wire wrap?\u003c\/h3\u003e\u003cp\u003eYes. The hardness 7 and 30 mm size are suitable for wire-wrapped pendants. The violet contrasts well with silver and golden copper.\u003c\/p\u003e\n\n\u003cp\u003eMore about amethyst: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/amatista\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003elapidary cabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"2x Piedras","offer_id":40333913751595,"sku":"","price":3.8,"currency_code":"EUR","in_stock":true},{"title":"5x piedras","offer_id":40333913784363,"sku":"","price":9.0,"currency_code":"EUR","in_stock":true},{"title":"10x piedras","offer_id":40333913817131,"sku":"","price":15.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/lot-of-2-tumbled-amethyst-214748.jpg?v=1699550365"},{"product_id":"rodados-naturales-de-sodalita","title":"Natural Sodalite Tumbled Stones","description":"\u003cp\u003eTumbled sodalite in its characteristic royal blue hue, with white calcite veins creating unique patterns on each piece. Size between 25 and 33 mm, weight between 15 and 28 g.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eSodalite (aluminum and sodium silicate with chlorine, feldspathoid group)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eIntense royal blue with white calcite veins; variable spots and bands per piece\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e25-33 mm diameter; 15-28 g weight\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; smoothly rounded surface\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polished finish characteristic of tumbled stones\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e5.5-6 Mohs — suitable for pocket stones and wrapped jewelry; handle with care, slightly softer than quartz\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil — majority commercial deposits; also mined in Canada (Bancroft, Ontario) and Namibia\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The blue color comes from the mineral's native chemical composition\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece Type\u003c\/th\u003e\n\n\u003ctd\u003eUnique vein pattern on each tumbled stone; shipped by intuitive selection within the size range\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow the white pattern forms\u003c\/h2\u003e\n\u003cp\u003eThe characteristic white veins of sodalite correspond to calcite and associated feldspars that crystallized with the mineral during its formation in alkaline magmatic rocks. Sodalite forms in silica-poor geological environments where sodium and chlorine were available in high concentrations; these environments are less common than those for quartz or common feldspar, which explains why significant deposits are scarce worldwide. When the rock is cut or polished, the contrast between the blue of sodalite and the white of calcite reveals the original crystallization texture.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is suitable for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — moderate hardness (5.5-6 Mohs) accommodates medium gauges without risk; we recommend not pressing too hard on the calcite veins, which are softer than the blue sodalite\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacramé\u003c\/strong\u003e — the medium weight (15-28 g) works perfectly for waxed thread pendants; the rounded silhouette can be tied directly without a cap\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone \/ meditation stone\u003c\/strong\u003e — sodalite is traditionally associated with clear communication and structured thought; the 25-33 mm size is the classic pocket stone format\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollecting and decorative compositions\u003c\/strong\u003e — pure royal blue is one of the most saturated among accessible minerals; ideal for collections with a defined color palette\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eSodalite in cultural tradition\u003c\/h2\u003e\n\u003cp\u003eSodalite was identified as a distinct mineral in 1811, from samples found in Greenland. Its name alludes to the sodium content in its chemical composition. Before its modern classification, it was commonly confused with lapis lazuli due to its similar blue tone, and it was used as a more affordable substitute in 19th-century European ornamental pieces. In modern crystal therapy interpretations, it is associated with expressive clarity, intuition, and the pursuit of truth, extending its cultural reading as a \"stone of serene thought.\"\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine sodalite\u003c\/h2\u003e\n\u003cp\u003eAuthentic sodalite features a saturated royal blue with white veins of irregular edges, not straight lines. Under a 10× loupe, the texture is granular with visible small crystals, not homogeneous like glass. Imitations made of paste or resin show a uniformly flat blue without internal variation, and the veins are usually regular or repetitive. Authentic sodalite also often exhibits a dull orange fluorescence under longwave UV light: this is one of the diagnostic properties of the mineral, especially useful for distinguishing it from lapis lazuli (which does not fluoresce).\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eIs it the same as lapis lazuli?\u003c\/h3\u003e\n\u003cp\u003eNo. Sodalite is a sodium and aluminum silicate with white calcite veins; lapis lazuli is an aggregate.\u003c\/p\u003e\n\n\u003ch3\u003eHow much does each tumbled stone weigh?\u003c\/h3\u003e\n\u003cp\u003eBetween 15 and 28 grams. The smaller tumbled stones in the range (25 mm) weigh about 15-18 g; the larger ones (33.\u003c\/p\u003e\n\n\u003ch3\u003eIs it suitable for everyday jewelry?\u003c\/h3\u003e\n\u003cp\u003eWith moderation. The hardness of 5.5-6 Mohs is lower than that of quartz: it holds up well in pendants and earrings, but in.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1x Piedra","offer_id":40333914046507,"sku":"","price":1.45,"currency_code":"EUR","in_stock":true},{"title":"2x Piedras","offer_id":40333914079275,"sku":"","price":2.8,"currency_code":"EUR","in_stock":true},{"title":"5x Piedras","offer_id":40333914112043,"sku":"","price":6.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/sodalite-tumbled-crystals-262447.jpg?v=1699547527"},{"product_id":"rodados-de-cornalina","title":"Carnelian Tumbles","description":"\u003cp\u003eTumbled carnelian from Brazil, approx. 24 mm, drum-polished. Intense orange hue due to native iron oxides in the agate structure. Available as a loose unit or in lots of 5 or 20 pieces for workshops and collections.\u003c\/p\u003e\n\n\u003ch2\u003eItem details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eCarnelian (orange chalcedony with Fe₂O₃ — variety of agate)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eApprox. 24 mm · Freeform ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and back\u003c\/th\u003e\n\n\u003ctd\u003eTumbled, rounded freeform\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eDrum-polished (satin-glossy)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e6.5-7 Mohs — resistant to everyday wear\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eNo treatment. Color from native iron oxides in the rock.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eItem type\u003c\/th\u003e\n\n\u003ctd\u003eAvailable loose or in lots of 5 and 20 units\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThese specific tumbled stones\u003c\/h2\u003e\n\u003cp\u003eBrazilian carnelian produces a more saturated orange than most African varieties: the concentration of hematite and goethite in the sediments of Bahia state generates a hue between intense peach and brick red, varying according to the depth of the deposit and the silicification formation temperature.\u003c\/p\u003e\n\u003cp\u003eThe tumbled finish respects natural variations in translucency: some areas are more translucent, others more opaque.\u003c\/p\u003e\n\n\u003ch2\u003eHow carnelian is formed\u003c\/h2\u003e\n\u003cp\u003eCarnelian is chalcedony — microcrystalline quartz — with inclusions of hematite (Fe₂O₃) and goethite (FeOOH) distributed throughout the silica matrix. It forms in cavities of volcanic and sedimentary rocks by precipitation from hydrothermal solutions rich in silica and iron.\u003c\/p\u003e\n\n\u003ch2\u003eUses of tumbled carnelian\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollection and decoration\u003c\/strong\u003e — the vibrant orange creates effective contrast with blue minerals like sodalite or lazurite.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — its hardness of 6.5-7 and 24 mm size make it ideal for pendants in silver, copper, or gold-filled wire.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLapidary workshops\u003c\/strong\u003e — lots of 20 pieces are common in workshops for finishing practice or selecting material for small cabochons.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eCarnelian in lapidary tradition\u003c\/h2\u003e\n\u003cp\u003eCarnelian is one of the most documented minerals in lapidary history: it appears in Mesopotamian seals from 3,000 BCE, in Egyptian pharaohs' pectorals, and in Viking warriors' brooches.\u003c\/p\u003e\n\u003cp\u003eIn crystal traditions, carnelian is associated with vitality, action, and confidence. It is linked to fire and the motivation to start projects.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine carnelian\u003c\/h2\u003e\n\u003cp\u003eGenuine carnelian shows natural color gradations when held to light: denser orange areas alternate with more translucent areas. Under 10× magnification, chalcedony has a very fine texture with no bubbles.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eIs the carnelian dyed or treated?\u003c\/h3\u003e\u003cp\u003eNo. The orange color comes from native iron oxides (hematite and goethite) in the chalcedony structure, without detectable subsequent treatment. This statement is based on lapidary observation; the piece does not include formal gemological certification.\u003c\/p\u003e\n\u003ch3\u003eIs it suitable for wire wrap or jewelry?\u003c\/h3\u003e\u003cp\u003eYes. Its hardness of 6.5-7 protects it from usual wear. The 24 mm size is suitable for pendants in silver, copper, or gold-filled wire. We recommend a closed bezel setting if mounting in a ring to maximize edge protection.\u003c\/p\u003e\n\u003ch3\u003eAre the lots of 5 or 20 pieces of the same dimensions?\u003c\/h3\u003e\u003cp\u003eYes. All tumbled stones in the lot are within the same size range (approx. 24 mm). There will be natural variations in tone between pieces, reflecting differences in composition within the deposit.\u003c\/p\u003e\n\u003ch3\u003eDoes the orange tone vary between pieces?\u003c\/h3\u003e\u003cp\u003eYes. The variation between soft peach and intense orange-red is natural and determined by the local concentration of iron oxides.\u003c\/p\u003e\n\u003ch3\u003eAre the dimensions exact?\u003c\/h3\u003e\u003cp\u003eThe indicated size (approx. 24 mm) is the representative value for the lot. As they are drum-tumbled freeform stones, each piece varies ±0.5 mm or more along its axes.\u003c\/p\u003e\n\u003ch3\u003eHow do you care for carnelian?\u003c\/h3\u003e\u003cp\u003eClean with a soft, damp cloth. Avoid acids and prolonged sun exposure. For more information: \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003emineral care guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eMore about carnelian: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/cornalina\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled minerals\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003elapidary cabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1x Piedra","offer_id":40333914144811,"sku":"","price":1.35,"currency_code":"EUR","in_stock":true},{"title":"5x Piedras","offer_id":40333914177579,"sku":"","price":6.0,"currency_code":"EUR","in_stock":true},{"title":"20x piedras","offer_id":40333914210347,"sku":"","price":20.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/tumbled-carnelian-crystals-975583.jpg?v=1699547101"},{"product_id":"ojo-de-halcon-rodados","title":"Hawkeye Rolled","description":"\u003cp\u003e20-35 mm hawk's eye tumbled stones with the characteristic blue-gray chatoyancy effect. Silicified crocidolite—riebeckite (blue amphibole) pseudomorphized in quartz—from South Africa.\u003c\/p\u003e\n\n\u003ch2\u003ePiece Information\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eHawk's Eye (silicified crocidolite — riebeckite pseudomorphized in quartz)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eApproximately 20-35 mm · Freeform ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and Back\u003c\/th\u003e\n\n\u003ctd\u003eTumbled, rounded freeform\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eDrum polished (satin)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e6.5-7 Mohs — resistant to everyday wear\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eSouth Africa\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece Type\u003c\/th\u003e\n\n\u003ctd\u003eAvailable in lots of 3 or 10 units\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eAbout these specific tumbled stones\u003c\/h2\u003e\n\u003cp\u003eThe chatoyancy of hawk's eye—that band of light that shifts when the stone is turned—is the result of parallel crocidolite fibers trapped within the quartz during silicification. The intensity of the effect varies among pieces in the same lot: more parallel and dense fibers produce a sharper eye; slightly disorganized fibers create a more diffuse and silky luster.\u003c\/p\u003e\n\u003cp\u003eThe tone in this lot is blue-gray with no golden hues. Tiger's eye (brown variant) and bull's eye (red variant) are the same mineral at different stages of oxidation; hawk's eye retains the unoxidized blue crocidolite.\u003c\/p\u003e\n\n\u003ch2\u003eHow Hawk's Eye is Formed\u003c\/h2\u003e\n\u003cp\u003eHawk's eye is the result of a two-stage mineral replacement process. First, riebeckite fibers (blue sodium amphibole, commercially known as crocidolite) form parallel laminations in the host rock.\u003c\/p\u003e\n\n\u003ch2\u003eUses of Hawk's Eye Tumbled Stones\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMineralogical collection\u003c\/strong\u003e — the blue-gray chatoyancy is one of the most valued optical effects in the phenomenal gems category.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the 20-35 mm size and polished quartz surface allow for clean wrapping; the chatoyancy effect adds visual movement to the pendant.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDecoration and compositions\u003c\/strong\u003e — pairs well with tiger's eye, labradorite, and other minerals with light effects.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eHawk's Eye in Lapidary Tradition\u003c\/h2\u003e\n\u003cp\u003eTiger's eye and hawk's eye varieties have been part of the lapidary tradition of Southern Africa for centuries. Their use in amulet pieces and ceremonial pendants is documented in cultures of the Cape belt.\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, hawk's eye is associated with broad vision, elevated perspective, and clarity in decision-making. Its blue color links it to the air element and communication.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to Recognize Genuine Hawk's Eye\u003c\/h2\u003e\n\u003cp\u003eGenuine hawk's eye shows the chatoyancy moving fluidly when the stone is turned under direct light; glass imitations exhibit a fixed band of luster or lack the effect. Under 10× magnification, the parallel fibrous structure of the mineral is observed.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs hawk's eye the same stone as tiger's eye?\u003c\/h3\u003e\u003cp\u003eThey are the same mineralogical process at different stages of oxidation. Hawk's eye retains unoxidized blue crocidolite; tiger's eye has undergone partial oxidation that converts iron to Fe³⁺ and stains the fibers yellow-brown.\u003c\/p\u003e\n\u003ch3\u003eIs the chatoyancy effect preserved in mounted jewelry?\u003c\/h3\u003e\u003cp\u003eYes, as long as the setting exposes the top face of the mineral to light. The effect is best appreciated with spot lighting (LED, table lamp) rather than diffuse ambient light.\u003c\/p\u003e\n\u003ch3\u003eDoes the effect vary between tumbled stones in the lot?\u003c\/h3\u003e\u003cp\u003eYes. The intensity and width of the eye depend on the orientation of the fibers in each individual piece. All tumbled stones in the lot exhibit the effect, but with natural variations in intensity.\u003c\/p\u003e\n\n\n\n\u003cp\u003eMore about hawk's eye: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/ojo-de-halcon\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled minerals\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003ecabochons with optical effect\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"3x stones","offer_id":40333916373035,"sku":"","price":3.0,"currency_code":"EUR","in_stock":true},{"title":"10x piedras","offer_id":40333916405803,"sku":"","price":8.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/blue-tiger-eye-tumbles-552562.jpg?v=1699552607"},{"product_id":"rodados-de-citrino-genuino","title":"Genuine Citrine Tumbled Stones","description":"\u003cp\u003eGenuine citrine tumbled stones from Brazil in two size ranges: 20-30 mm and 30-40 mm. The golden yellow color comes from trivalent iron oxides (Fe³⁺) incorporated during quartz crystallization, not from heat treatment of amethyst. Material polished in a lapidary tumbler.\u003c\/p\u003e\n\n\u003ch2\u003eItem details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eGenuine Citrine (quartz with native Fe³⁺)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003e20-30 mm (S format) · 30-40 mm (M format) · Freeform ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and back\u003c\/th\u003e\n\n\u003ctd\u003eTumbled, rounded freeform\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eTumbler polished (satin)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs — resistant to everyday wear\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. Golden color from native iron oxides, not from amethyst heating.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eItem type\u003c\/th\u003e\n\n\u003ctd\u003eAvailable in 2 formats (S 20-30 mm \/ M 30-40 mm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eAbout these tumbled stones\u003c\/h2\u003e\n\u003cp\u003eThe distinction between genuine citrine and treated amethyst is relevant for the discerning collector: heated citrine — which accounts for most of the market — has an intense, almost garish, orange-amber hue, with visible twinning inside the crystals under light. Genuine citrine has a softer, translucent golden yellow, with natural variations in intensity between the growth zones of the quartz.\u003c\/p\u003e\n\u003cp\u003eIn these Brazilian tumbled stones, the color is uniform in the honey-yellow range, with no orange concentrations that would indicate heat treatment. The freeform shape of the tumbled stone shows the mineral in its most direct expression.\u003c\/p\u003e\n\n\u003ch2\u003eGenuine citrine vs. treated amethyst\u003c\/h2\u003e\n\u003cp\u003eMore than 90% of the citrine circulating in the gemological market is Brazilian or Uruguayan amethyst subjected to controlled heating (between 470 and 560 °C), which transforms the Fe²⁺ in amethyst into Fe³⁺ and shifts the color from violet to yellow-orange.\u003c\/p\u003e\n\n\u003ch2\u003eUses for citrine tumbled stones\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMineralogical collection\u003c\/strong\u003e — genuine citrine is notable precisely for its rarity compared to the market dominated by heated amethyst.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the M format (30-40 mm) is suitable for wire-wrapped pendants; the transparency of citrine captures light well.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDecoration\u003c\/strong\u003e — the warm golden tone works well in compositions alongside clear quartz or amber.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eCitrine in lapidary tradition\u003c\/h2\u003e\n\u003cp\u003eCitrine was used in classical antiquity as an economical substitute for yellow topaz. In the Art Deco and Art Nouveau periods, it was a favorite stone for silver brooches and earrings, valued for its color without the coldness of peridot or the intensity of topaz.\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, citrine is associated with prosperity, solar energy, and mental clarity. It is sometimes called \"the merchant's stone\" in references to Chinese-rooted feng shui.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine citrine\u003c\/h2\u003e\n\u003cp\u003eGenuine citrine has a soft golden yellow with natural gradation between zones; treated citrine has a saturated orange-amber with abrupt color changes. Under 10× magnification, genuine citrine shows the usual liquid micro-inclusions of hydrothermal quartz; heated citrine may show fine internal fractures if the process was rapid. Untreated citrine is more translucent than transparent; heated citrine is often more opaque in the twinning planes.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eHas this citrine been heated from amethyst?\u003c\/h3\u003e\u003cp\u003eNo. The golden yellow color of these tumbled stones is the result of trivalent iron (Fe³⁺) present natively during quartz crystallization, with no detectable subsequent heat treatment. Statement based on lapidary observation; the piece does not include formal gemological certification.\u003c\/p\u003e\n\u003ch3\u003eWhich format is best for wire wrap?\u003c\/h3\u003e\u003cp\u003eThe M format (30-40 mm) offers more surface for wrapping and better presence as a pendant. For earrings, the S format (20-30 mm) is more balanced in weight.\u003c\/p\u003e\n\u003ch3\u003eDoes the color intensity vary between pieces?\u003c\/h3\u003e\u003cp\u003eYes. Genuine citrine exhibits natural variations in hue within the golden-yellow range. The intensity is not uniform between pieces from the same batch — this is precisely a sign of authenticity.\u003c\/p\u003e\n\n\u003cp\u003eMore about citrine: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/citrino\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003elapidary cabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"20-30mm","offer_id":40333916438571,"sku":"","price":4.0,"currency_code":"EUR","in_stock":true},{"title":"30-40mm","offer_id":40333916471339,"sku":"","price":4.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/genuine-citrine-tumbles-805459.jpg?v=1699551569"},{"product_id":"onix-negro-rodados","title":"Tumbled Black Onyx","description":"\u003cp\u003eBlack onyx tumbled stones, 31-37 mm, with intense, uniform black tone, tumbled in a lapidary barrel. Satin surface with sparkles in the more convex areas.\u003c\/p\u003e\n\n\u003ch2\u003ePiece details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eBlack onyx (black chalcedony, a variety of microcrystalline quartz)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003e31-37 mm · Weight: 16-20 g · Freeform ±0.5 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and back\u003c\/th\u003e\n\n\u003ctd\u003eTumbled, rounded freeform, convex back\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eBarrel polished (satin-glossy)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e6.5-7 Mohs — resistant to everyday wear\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eMaterial acquired in lapidary wholesale market\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eNo detectable treatment. Commercial black onyx may have received standard carbon impregnation in the industry. Statement based on lapidary observation; the piece does not include formal gemological certification.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece type\u003c\/th\u003e\n\n\u003ctd\u003eStandard tumbled stone — each unit varies slightly in shape\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThese particular tumbled stones\u003c\/h2\u003e\n\u003cp\u003eBlack onyx has a visual constant rarely surpassed in the mineralogical collection: the black is absolute. There are no contrasting veins or translucency.\u003c\/p\u003e\n\u003cp\u003eThe barrel finish of this lot is satin with a concentration of shine in the more convex areas.\u003c\/p\u003e\n\n\u003ch2\u003eHow black onyx is formed\u003c\/h2\u003e\n\u003cp\u003eOnyx is chalcedony — microcrystalline quartz — that precipitates in parallel layers within hydrothermal cavities. When the color layer is uniform black instead of banded, it is called black onyx.\u003c\/p\u003e\n\n\u003ch2\u003eUses of black onyx tumbled stones\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollection and decoration\u003c\/strong\u003e — absolute black creates effective contrast with light-colored minerals. Ideal for mineralogical compositions in trays or frames.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the uniform surface allows for a clean hold with 20 gauge wire; the 31-37 mm size is suitable for wrapped pendants.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCarry stone \/ palmstone\u003c\/strong\u003e — the weight (16-20 g) and smooth finish make these tumbled stones a comfortable hand piece.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eOnyx in lapidary tradition\u003c\/h2\u003e\n\u003cp\u003eOnyx was widely used in antiquity for seals, cameos, and goldsmith pieces.\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, black onyx is associated with protection, grounding, and inner strength. It is described as a stone of containment, associated with concentration and stability in moments of dispersion.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine black onyx\u003c\/h2\u003e\n\u003cp\u003eGenuine onyx is cold to the touch and gradually warms with hand heat. Under 10× magnification, it shows a fine microcrystalline texture with no bubbles.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eIs black onyx dyed?\u003c\/h3\u003e\u003cp\u003eCommercial black onyx frequently receives carbon impregnation treatment to homogenize the color. This process is standard in the industry and does not affect durability.\u003c\/p\u003e\n\u003ch3\u003eIs it suitable for wire wrap or artisanal jewelry?\u003c\/h3\u003e\u003cp\u003eYes. The smooth surface and hardness of 6.5-7 protect it from usual wear. The 31-37 mm size is suitable for pendants in 20-22 gauge wire wrap.\u003c\/p\u003e\n\u003ch3\u003eDoes the shape vary between units?\u003c\/h3\u003e\u003cp\u003eYes. Barrel polishing generates individual freeforms. The 31-37 mm dimensions are the range of the lot; each unit will have its characteristic shape within that interval.\u003c\/p\u003e\n\u003ch3\u003eWhat differentiates onyx from jet?\u003c\/h3\u003e\u003cp\u003eJet is lignite (fossilized organic carbon): light, warm to the touch, hardness 2.5-4, and resinous luster. Onyx is chalcedony (SiO₂): denser, cold to the touch, hardness 6.5-7, and vitreous luster. The weight in hand distinguishes them immediately.\u003c\/p\u003e\n\u003ch3\u003eHow much does each unit weigh?\u003c\/h3\u003e\u003cp\u003eBetween 16 and 20 g depending on the piece, corresponding to the 31-37 mm size range. If you need a very specific weight for a piece of jewelry, contact us for manual selection.\u003c\/p\u003e\n\u003ch3\u003eHow to care for black onyx?\u003c\/h3\u003e\u003cp\u003eClean with a soft damp cloth. Avoid acids and ultrasonic cleaners that can affect the surface treatment. For more information: \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003emineral care guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eMore about onyx: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/onix-negro\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003etumbled minerals\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003elapidary cabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40333921484843,"sku":"","price":3.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/black-onyx-tumble-478110.jpg?v=1699552831"},{"product_id":"rodados-de-granate-almandino","title":"Tumbled Almandine Garnet","description":"\u003cp\u003eAlmandine garnet (Fe₃Al₂(SiO₄)₃) in tumbled form with the intense red to dark garnet red of the variety.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eAlmandine Garnet (nesosilicate, Fe₃Al₂(SiO₄)₃, pyralspite group)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eDark red to intense garnet red; occasionally with violet hues depending on the proportion of iron and manganese\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e20-30 mm diameter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; rounded outline with vitreous luster\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7-7.5 Mohs\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCrystal System\u003c\/th\u003e\n\n\u003ctd\u003eCubic (isometric); natural crystals in rhombic dodecahedron or trapezohedron\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDensity\u003c\/th\u003e\n\n\u003ctd\u003e~4.3 g\/cm³\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eIndia (Rajasthan, Odisha, main lapidary market), Brazil, Mozambique\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The red color comes from the native chemical composition (iron in the silicate structure)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece Type\u003c\/th\u003e\n\n\u003ctd\u003eLot; intuitive selection by saturation and brightness\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow Almandine Garnet is Formed\u003c\/h2\u003e\n\u003cp\u003eAlmandine garnet crystallizes mainly in metamorphic rocks —schists, gneisses, mica schists— under conditions of medium to high pressure and temperature (200-800 MPa, 500-700 °C).\u003c\/p\u003e\n\n\u003ch2\u003eWhat This Format is Good For\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — 7-7.5 Mohs hardness, tolerates medium gauges (0.8-1.2 mm) and working pressure without marking the surface; dark red stands out especially with oxidized silver and copper\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacramé\u003c\/strong\u003e — the compact size and deep color work well in black, burgundy, or dark brown thread bracelets and necklaces; the medium weight (~20-25 g) is comfortable for pendants\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone\u003c\/strong\u003e — the medium-high density (~4.3 g\/cm³) provides a solid, well-grounded feel; historically associated with vitality and determination\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eGarnet collecting\u003c\/strong\u003e — almandine is the reference variety to compare with rhodolite garnet (more translucent and violet), spessartine (orange-mandarin), and pyrope (purer red without violet hues)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eGarnet in Cultural Tradition\u003c\/h2\u003e\n\u003cp\u003eGarnet is one of the minerals with the most continuous documented use. The Romans called it \u003cem\u003ecarbunculus\u003c\/em\u003e (little burning coal) and set it in gold throughout the Mediterranean basin. In the European High Middle Ages, it appears in reliquaries, crowns, and high-representation jewelry: the 7th-century Anglo-Saxon Garnet Cross (British Museum) and the Sutton Hoo treasures (also 7th century) include almandines in cloisonné settings.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to Recognize Genuine Almandine Garnet\u003c\/h2\u003e\n\u003cp\u003eAuthentic almandine shows variable transparency when held to light: some areas allow light to pass through in intense red, while others are more opaque depending on the iron concentration.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the difference between almandine garnet and rhodolite garnet?\u003c\/h3\u003e\n\u003cp\u003eRhodolite is an intermediate variety between pyrope and almandine, with less iron and more magnesium; it has a more violet-pink hue and greater transparency.\u003c\/p\u003e\n\n\u003ch3\u003eCan it be used in jewelry?\u003c\/h3\u003e\n\u003cp\u003eYes. The 7-7.5 Mohs hardness makes it suitable for rings, bracelets, and pendants for everyday wear. In tumbled form, it is set in an open or closed bezel; the closed bezel setting better protects the edges of the tumbled stone. Consult our \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ejewelry care guide\u003c\/a\u003e for maintenance recommendations.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the \"garnet color\" in fabrics correspond to almandine?\u003c\/h3\u003e\n\u003cp\u003eYes. The dark red, slightly violet tone that defines \"garnet color\" in textiles and design refers visually to almandine —the most common and accessible variety— and Bohemian pyrope.\u003c\/p\u003e\n\n\u003ch3\u003eIs it magnetic?\u003c\/h3\u003e\n\u003cp\u003eAlmandine with high iron content may show a slight paramagnetic attraction to a very strong magnet, but under normal conditions, it does not adhere.\u003c\/p\u003e\n\n\u003ch3\u003eHow is it cared for?\u003c\/h3\u003e\n\u003cp\u003eClean with water and neutral soap. Store separately from harder stones (corundum, diamond). Almandine withstands everyday use well due to its hardness; avoid sharp blows to the edge as garnet has imperfect cleavage and can fracture with concentrated impacts. More in the \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ejewelry care guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eSee also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/gemas-facetadas\"\u003efaceted gems\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/todas-las-joyas\"\u003enatural stone jewelry\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40333921812523,"sku":"","price":4.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/tumbled-garnet-stone-crystals-546284.jpg?v=1701531522"},{"product_id":"rodados-de-cuarzo-con-rutilo-dorado","title":"Golden Rutilated Quartz Tumbled Stones","description":"\u003cp\u003eTransparent macrocrystalline quartz with golden-amber rutile (TiO₂) inclusions forming needles and internal thread networks.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eMacrocrystalline quartz (SiO₂) with golden rutile (TiO₂) inclusions\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eTransparent to slightly smoky base with golden, amber, or coppery rutile needles; total variation between pieces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e25-40 mm (natural variation within the lot)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; rounded outline, translucent\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eVitreous polish of quartz; rutile needles visible inside\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs (matrix quartz)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil (Minas Gerais, world's main deposit of lapidary-grade rutilated quartz)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. Rutile needles are native inclusions crystallized within the quartz matrix\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eType of piece\u003c\/th\u003e\n\n\u003ctd\u003eUnique needle pattern per tumbled stone; intuitive selection by visual design\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow Rutile Needles Form\u003c\/h2\u003e\n\u003cp\u003eRutile (TiO₂) crystallizes at high temperatures —usually before or simultaneously with quartz— and its prisms become trapped within the growing quartz network.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is suitable for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the vitreous luster of quartz displays the golden needles from different angles under direct light; each piece produces a unique visual effect. Pairs with silver (neutral background that doesn't compete with gold), gold-filled (tonal harmony), and brass (warm ambiance)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacrame\u003c\/strong\u003e — the 25-40 mm size and medium weight (18-30 g) are suitable for string pendants; the translucent quartz captures ambient light and varies visually throughout the day\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone \/ contemplation object\u003c\/strong\u003e — turning the tumbled stone against the light to observe the changing angle of the needles is the most characteristic use experience of this stone\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eInclusion collecting\u003c\/strong\u003e — each tumbled stone is documentable by its pattern; interesting alongside quartz with tourmaline, quartz with epidote, and other inclusion quartz from the lapidary collection\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eRutilated Quartz in Cultural Tradition\u003c\/h2\u003e\n\u003cp\u003eRutilated quartz was documented in medieval Europe under the Italian name \u003cem\u003ecapelli di Venere\u003c\/em\u003e (Venus' hair) due to the appearance of the golden threads within the stone. Pliny the Elder mentions it among varieties of quartz notable for their inclusions. In Brazil, garimpeiros (artisanal miners) separated it from common quartz since the 18th century as a valuable material for fine jewelry, given the rarity of specimens with long, well-formed needles.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine rutilated quartz\u003c\/h2\u003e\n\u003cp\u003eAuthentic rutile needles are three-dimensional: they change angle when the piece is rotated and are visible through the quartz on different planes.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat exactly is rutile?\u003c\/h3\u003e\n\u003cp\u003eRutile is a titanium mineral (TiO₂) that crystallizes in the tetragonal system, forming elongated prisms.\u003c\/p\u003e\n\n\u003ch3\u003eIs every piece unique?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The needle pattern—density, orientation, length, and color—is the result of the crystallization process under specific pressure and temperature conditions.\u003c\/p\u003e\n\n\u003ch3\u003eIs it the same as \"golden healer\"?\u003c\/h3\u003e\n\u003cp\u003eNo. Golden healer is quartz with a surface or internal layer of iron oxide (limonite, goethite) that gives it a diffuse golden appearance.\u003c\/p\u003e\n\n\u003ch3\u003eCan it be used in jewelry that comes into contact with the skin?\u003c\/h3\u003e\n\u003cp\u003eYes. Quartz is chemically stable and inert. Rutile needles are enclosed within the matrix and pose no risk of contact.\u003c\/p\u003e\n\n\u003ch3\u003eHow is it cared for?\u003c\/h3\u003e\n\u003cp\u003eClean with a soft cloth or water and neutral soap. The 7 Mohs hardness withstands daily use. Avoid strong acids that could attack the rutile in areas where it surfaces on the tumbled stone. Store separately from very hard stones (corundum, diamond). More in the \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ejewelry care guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eSee also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/todas-las-joyas\"\u003enatural stone jewelry\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003efaceted cabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"A- 51x40x20mm","offer_id":40333921910827,"sku":"","price":6.0,"currency_code":"EUR","in_stock":false},{"title":"H- 36x26x22mm","offer_id":40333921943595,"sku":"","price":6.0,"currency_code":"EUR","in_stock":false},{"title":"C- 36x27x21mm","offer_id":40333921976363,"sku":"","price":6.0,"currency_code":"EUR","in_stock":false},{"title":"D- 38x31x22mm","offer_id":40333922009131,"sku":"","price":6.0,"currency_code":"EUR","in_stock":false},{"title":"E- 44x27x18mm","offer_id":40333922041899,"sku":"","price":6.0,"currency_code":"EUR","in_stock":false},{"title":"F- 27x26x31mm","offer_id":40333922074667,"sku":"","price":6.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/rutilated-quartz-tumbled-pocket-stone-241951.jpg?v=1699547941"},{"product_id":"rodados-de-hematita","title":"Hematite Tumbles","description":"\u003cp\u003eTumbled hematite with the specular metallic luster that distinguishes this iron oxide from any other lapidary mineral. Silvery-gray to black color on a polished surface; between 20 and 30 mm in diameter and 15 to 25 grams.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial fact sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eHematite (Fe₂O₃), iron (III) oxide\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eSilvery-gray to metallic black on a polished surface; reddish-brown streak (key diagnostic)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e20-30 mm in diameter; 15-25 g\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; rounded outline\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eMirror polish with specular metallic luster\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e5-6 Mohs\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDensity\u003c\/th\u003e\n\n\u003ctd\u003e~5.3 g\/cm³ — notably heavier than quartz (~2.65 g\/cm³) at the same size\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil (Minas Gerais), Morocco, Spain (Almería)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The metallic luster and gray color are native properties of the mineral\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eType of piece\u003c\/th\u003e\n\n\u003ctd\u003eLot; intuitive selection by luster and weight\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow hematite is formed\u003c\/h2\u003e\n\u003cp\u003eHematite is the most abundant iron oxide in the Earth's crust and forms in three main contexts. In banded iron formation (BIF) sedimentary deposits, it precipitated 2,400-1,800 million years ago when free oxygen began to accumulate in the oceanic atmosphere and oxidized dissolved iron. In hydrothermal contexts, hot fluid circulating through fractures deposits hematite in veins alongside quartz and calcite. In metamorphic environments, heat and pressure reorganize previous iron oxides and produce the high-luster specular variety—called specular hematite—whose laminar crystals are responsible for the metallic reflection of polished tumbled stones.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is good for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the 5-6 Mohs hardness allows working with fine and medium gauges (0.6-1.0 mm); the metallic luster combines particularly well with silver (cool-silver contrast), copper (industrial feel), and oxidized brass\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacrame\u003c\/strong\u003e — the notable weight (15-25 g) lends itself to long necklaces and thick thread pieces; avoid earrings unless the design is specifically intended for that weight\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone\u003c\/strong\u003e — the high density and cool texture of the metallic polish make hematite one of the most recognizable tumbled stones by touch; historically it is associated with grounding and stability\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eIron oxide collecting\u003c\/strong\u003e — contrasts with limonite (yellow), goethite (brown), and magnetite (also metallic but magnetic) in thematic collections of iron minerals\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eHematite in cultural tradition\u003c\/h2\u003e\n\u003cp\u003eThe use of hematite as a red pigment—in powder, the mineral leaves a reddish-brown streak—has been documented since the Paleolithic: red ochre made from ground hematite appears in burials from 100,000 years ago in South Africa and in cave paintings across Europe. The Greek name \u003cem\u003eαἱματίτης\u003c\/em\u003e (\u003cem\u003ehaima\u003c\/em\u003e = blood) refers to the color of the streak and powder. The Romans called it \u003cem\u003elapis haematites\u003c\/em\u003e and believed it protected soldiers in battle; polished hematite has been found in Celtic and Iberian necropolises as an amulet. In modern crystal therapy readings, it is associated with grounding, protection, and concentration, extending the historical image of a mineral linked to physical strength.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine hematite\u003c\/h2\u003e\n\u003cp\u003eThe most reliable test is the streak: rub the hematite on unglazed ceramic or the back of a tile. Authentic hematite leaves an unmistakable reddish-brown streak even if the mineral's surface is metallic-gray. Reconstituted hematine (hematite powder compacted with resin) leaves a similar streak but weighs less and may show bubbles under magnification.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eIs hematite magnetic?\u003c\/h3\u003e\n\u003cp\u003ePure natural hematite is not magnetic under normal conditions. Tumbled stones sold as \"magnetic hematite\" are usually reconstituted hematine.\u003c\/p\u003e\n\n\u003ch3\u003eWhy is the streak red if the mineral looks gray?\u003c\/h3\u003e\n\u003cp\u003eThe surface color reflects how crystals scatter light.\u003c\/p\u003e\n\n\u003ch3\u003eCan hematite get wet?\u003c\/h3\u003e\n\u003cp\u003eYes, it tolerates contact with water. Dry thoroughly after cleaning. Hematite is an already oxidized iron oxide.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40333922730027,"sku":"","price":2.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/hematite-tumblestones-500004.jpg?v=1699551168"},{"product_id":"ojo-de-tigre-rodados","title":"Tiger's Eye Tumbled Stones","description":"\u003cp\u003eTumbled tiger's eye in its classic golden variety, with the characteristic movable reflection (chatoyancy) that distinguishes the mineral. Sizes range from 20×12 mm for the smallest piece to 37×18 mm for the largest. Origin: South Africa, a globally recognized deposit. Each tumbled stone is individually selected from the lot.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eTiger's eye (quartz with fibrous inclusions of oxidized crocidolite)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eDeep golden with dark brown streaks and a silky mobile reflection when the piece is rotated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003eBetween 20×12 mm and 37×18 mm, by selection\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; smoothly rounded surface\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polished finish characteristic of tumbled stones, without sharp edges\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e6.5-7 Mohs — suitable for daily use as a pocket stone, frequent handling, and wire-wrapped jewelry\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eSouth Africa (Northern Cape province) — classic documented tiger's eye deposit\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The golden hue comes from the natural oxidation of the original crocidolite; no detectable chemical treatments\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eType of piece\u003c\/th\u003e\n\n\u003ctd\u003eUnique shape and veins in each tumbled stone; shipped by intuitive selection within the size range\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow the chatoyancy effect is formed\u003c\/h2\u003e\n\u003cp\u003eThe movable luster of tiger's eye is due to fibrous inclusions of crocidolite (an amphibole asbestos) that quartz encapsulated during its geological formation. When these fibers are oriented parallel and the piece is cut or polished with the axis perpendicular to the fibrous direction, light reflects in narrow bands that appear to shift when the stone is rotated.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is good for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the 6.5-7 Mohs hardness allows for medium gauges (0.8-1 mm) without risk of scratching the polished surface; elongated formats (37×18 mm) are most suitable as a centerpiece in pendants\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacramé\u003c\/strong\u003e — the smooth tumbled finish can be tied directly without the need for a cap; the average weight (approximately 8-25 g per piece) works well in waxed cord bracelets and necklaces\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone\u003c\/strong\u003e — the ergonomic shape and high hardness make tiger's eye one of the most durable tumbled stones for everyday carry; it resists rubbing against keys and coins without scratching\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollecting and decorative arrangements\u003c\/strong\u003e — chatoyancy is best appreciated on a dark tray with spot lighting; ideal for mineralogy displays or zen compositions on sand\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eTiger's eye in cultural tradition\u003c\/h2\u003e\n\u003cp\u003eTiger's eye has historically been associated with attentive observation and personal presence: in classical Rome, soldiers carried mineral amulets before military campaigns due to its visual resemblance to the iris of the feline.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine tiger's eye\u003c\/h2\u003e\n\u003cp\u003eAuthentic tiger's eye shows the movable reflection of chatoyancy: when the piece is tilted under a single light source, a bright band shifts perpendicular to the direction of the crocidolite fibers.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eDo all pieces have the same degree of chatoyancy?\u003c\/h3\u003e\n\u003cp\u003eNo. The intensity of the movable reflection depends on the orientation of the crocidolite fibers in each tumbled stone. In this selection, all pieces show visible chatoyancy under direct light, but some present clearer bands than others depending on the original cut.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the approximate weight of each tumbled stone?\u003c\/h3\u003e\n\u003cp\u003eBetween 8 and 25 grams depending on the size. Small pieces (20×12 mm) are around 8-12 g; large ones (37×18 mm) reach up to 25 g. For macramé or pocket stone, both ranges work; for a main wire-wrapped pendant, medium and large pieces are more visible.\u003c\/p\u003e\n\n\u003ch3\u003eIs it suitable for everyday jewelry?\u003c\/h3\u003e\n\u003cp\u003eYes. The 6.5-7 Mohs hardness is the same as macrocrystalline quartz and withstands daily rubbing without scratching under normal conditions. For rings, we prefer cabochon formats with bezel settings; tumbled stones work better in pendants and bracelets where the rounded surface is part of the visual appeal.\u003c\/p\u003e\n\n\u003cp\u003eMore about tiger's eye: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/ojo-de-tigre\"\u003eproperties, meaning and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/piedrasdemeditacion\"\u003emeditation stones\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1x Piece","offer_id":40424189755435,"sku":"","price":3.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/golden-tiger-eye-tumblestones-650097.webp?v=1699531250"},{"product_id":"rodados-de-dumortierita-en-cuarzo-cuarzo-azul","title":"Tumbled Dumortierite in Quartz - Blue Quartz","description":"\u003cp\u003eTumbled dumortierite in quartz from Brazil: milky quartz with acicular blue dumortierite inclusions that form veins and patches on the white matrix. Available in two sizes—small 18×14 mm and large 30×15 mm—with a unique pattern on each piece. Commercially known as \"blue quartz.\"\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eMacrocrystalline quartz with dumortierite inclusions (blue aluminum borosilicate)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eWhite to translucent base with intense blue to grayish-blue veins and patches\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003eSmall format 18×14 mm; large format 30×15 mm (natural variations)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; smoothly rounded surface\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polished finish characteristic of tumbled stones\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs (matrix quartz) — suitable for daily wear, wire-wrapped jewelry, and pocket stone\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil — dumortierite-bearing quartz deposits in Minas Gerais and Bahia\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The blue color comes from native dumortierite inclusions in the quartz matrix\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eType of piece\u003c\/th\u003e\n\n\u003ctd\u003eEach tumbled stone has a unique vein pattern; shipping by intuitive selection within the chosen format\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow this pattern is formed\u003c\/h2\u003e\n\u003cp\u003eDumortierite is an aluminum borosilicate that crystallizes in fibrous aggregates of intense blue. When incorporated during quartz formation, the fibers become trapped within the crystalline matrix and produce the characteristic veined appearance of \"blue quartz.\" Unlike lapis lazuli (a mineral aggregate) or sodalite (a homogeneous mineral), here the blue appears distributed in patches and veins on a translucent white background, revealing the internal structure of the quartz.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is good for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — 7 Mohs hardness withstands medium and fine gauges without marks; large formats (30×15 mm) have enough presence for a main pendant, small ones (18×14 mm) work well for earrings or bracelets\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacramé\u003c\/strong\u003e — light to medium weight and smooth surface facilitate direct knotting; the blue\/white contrast adds visual focus to natural thread compositions\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone\u003c\/strong\u003e — compact format and high hardness, no risk of chipping; traditionally associated with mental clarity and sustained focus\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollecting\u003c\/strong\u003e — the variability of the pattern makes each tumbled stone unique; interesting for mineral collections with blue inclusions\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eDumortierite in cultural tradition\u003c\/h2\u003e\n\u003cp\u003eDumortierite was first described in 1881 by the French mineralogist Eugène Dumortier, after whom it is named.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine dumortierite in quartz\u003c\/h2\u003e\n\u003cp\u003eAuthentic dumortierite quartz shows irregular blue veins, with blurred edges where the mineral fibers penetrate the surrounding quartz. Under 10× magnification, the fibrous, non-homogeneous structure of the inclusions is visible. Imitations of dyed quartz tend to have a uniform blue that penetrates through internal fractures and leaves dark edges where the pigment accumulates.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the difference between \"blue quartz\" and pure dumortierite?\u003c\/h3\u003e\n\u003cp\u003e\"Blue quartz\" is macrocrystalline quartz with dumortierite inclusions; pure dumortierite is a compact, homogeneous blue mineral without a visible matrix. This selection is the version with quartz: the blue appears in veins and patches on a translucent white background, not as a uniform block.\u003c\/p\u003e\n\n\u003ch3\u003eDo the two formats come from the same material?\u003c\/h3\u003e\n\u003cp\u003eYes. Small (18×14 mm) and large (30×15 mm) are cut from the same Brazilian material; the size of the final tumbled stone changes, but the composition and range of blue tones are the same.\u003c\/p\u003e\n\n\u003ch3\u003eIs it suitable for daily wear rings?\u003c\/h3\u003e\n\u003cp\u003eIn tumbled format, it works best in wire-wrapped pendants, bracelets, and earrings, where the rounded surface is part of the visual appeal. For rings, we prefer cabochons with a flat back; see the \u003ca href=\"\/en\/collections\/cabujones\"\u003ecabochon collection\u003c\/a\u003e for formats suitable for bezel setting.\u003c\/p\u003e\n\n\u003cp\u003eMore about dumortierite: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/dumortierita-en-cuarzo\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/piedrasdemeditacion\"\u003emeditation stones\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1x Piedra","offer_id":40424188575787,"sku":"","price":3.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/dumortierite-in-quartz-tumblestones-blue-quartz-294786.webp?v=1699531282"},{"product_id":"rodados-de-cuarcita-verde-aventurina","title":"Green Quartzite Tumbled Stones - Aventurine","description":"\u003cp\u003eGreen aventurine tumbled stones —quartzite with micro-inclusions of fuchsite (chromium mica) that produce the characteristic glittering reflection known as aventurescence— in sizes from 23 to 28 mm.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eGreen Aventurine (quartzite with fuchsite inclusions, chromium mica that provides the green color and aventurescence)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eIntense to medium green with glittering reflection (aventurescence) under direct light\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e23-28 mm (tumbled stone range; minimum ~23×15 mm, maximum ~28×18 mm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled by tumbling; gently rounded surface\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polish\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e6.5-7 Mohs (matrix quartz) — suitable for frequent use in pendants, earrings and bracelets\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil (greener and more saturated variety); also mined in India (more commercially widespread)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The green color and glittering reflection come from native fuchsite inclusions in the quartz matrix\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eType of piece\u003c\/th\u003e\n\n\u003ctd\u003eDistribution of inclusions and variable tone; selection by lot\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow aventurescence is formed\u003c\/h2\u003e\n\u003cp\u003eAventurescence is the metallic and glittering reflection characteristic of aventurine, produced by micro-lamellae of fuchsite—a chromium mica that gives it its intense green color—sub-parallel oriented within the quartz matrix.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is good for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the 6.5-7 Mohs hardness is high; it withstands fine and medium gauges without risk of marking the surface; the compact format (23-28 mm) is ideal for earrings, small pendants and bracelet elements\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacramé\u003c\/strong\u003e — suitable size and light weight for thread bracelets and pendants; the intense green works with natural hemp thread, raw cotton or brown waxed thread\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone\u003c\/strong\u003e — the 23-28 mm format is classic for pocket stones; green aventurine is one of the most common tumbled stones for this use due to its hardness and manageable size\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDecorative compositions\u003c\/strong\u003e — green aventurine is a classic in crystal compositions and crystal grids for its color representing vegetation and its easy combination with other green minerals\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eAventurine in cultural tradition\u003c\/h2\u003e\n\u003cp\u003eThe name \"aventurine\" comes from the Italian \u003cem\u003eper avventura\u003c\/em\u003e (\"by chance\"), alluding to the accidental discovery in the early 18th century in Venice of a type of glass with suspended copper particles that produced a glittering sparkle similar to that of the mineral. When mineralogists later identified the natural mineral with the same optical effect, they adopted the already popularized name of Venetian glass. In China, green quartzites with brilliant inclusions were used since ancient times as a substitute for jade in seals, ceremonial vessels and mid-range ornaments.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine aventurine\u003c\/h2\u003e\n\u003cp\u003eAventurescence—the glittering sparkle of multiple points—is the main diagnostic sign: under direct light, the surface should show golden-green flashes when the piece is rotated.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the difference between \"green quartzite\" and \"aventurine\"?\u003c\/h3\u003e\n\u003cp\u003eTechnically they are the same material: aventurine is a quartzite (polycrystalline quartz) with fuchsite inclusions.\u003c\/p\u003e\n\n\u003ch3\u003eAre all aventurines green?\u003c\/h3\u003e\n\u003cp\u003eNo. There are also blue aventurine (with dumortierite or crocidolite inclusions), orange aventurine (with goethite) and red aventurine (with hematite).\u003c\/p\u003e\n\n\u003ch3\u003eIs it durable for everyday jewelry?\u003c\/h3\u003e\n\u003cp\u003eThe 6.5-7 Mohs hardness makes it suitable for frequent use in wire-wrapped pendants, earrings and bracelets.\u003c\/p\u003e\n\n\u003ch3\u003eIs the glittering sparkle always visible?\u003c\/h3\u003e\n\u003cp\u003eAventurescence is only visible under direct spot light (sun, flashlight, spotlight).\u003c\/p\u003e\n\n\u003ch3\u003eHow to care for it?\u003c\/h3\u003e\n\u003cp\u003eClean with a soft cloth and warm water. Hardness is high; avoid sudden impacts. Store away from very hard stones (diamond, corundum) to prevent scratching the polished surface. More in the \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ejewelry care guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eSee also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/piedrasdemeditacion\"\u003emeditation stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003ecabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1x Piece","offer_id":40424189984811,"sku":"","price":3.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/green-quartzite-aventurine-tumblestones-414029.webp?v=1699531281"},{"product_id":"rodados-de-jaspe-mokaita","title":"Mookaite Jasper Tumbled Stones","description":"\u003cp\u003eTumbled mookaite jasper (also spelled mokaita in Spanish) from Mooka Creek, Western Australia, the only documented deposit of this mineral in the world.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Information\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eMookaite Jasper (radiolarian chert; geological name: siliceous siltstone of volcanic origin)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eBurgundy red, golden ocher, and cream; the proportion of colors varies per piece depending on the cut\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003eSmall format 24×18 mm; large format 37×24 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; smoothly rounded surface\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polished\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e6-7 Mohs — high for a jasper; scratch-resistant in daily use\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eMooka Creek, Kennedy National Park, Western Australia — only documented deposit of authentic mookaite\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. Colors come from different concentrations of hematite (red) and goethite (ocher) in the sedimentary layers of the rock\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece Type\u003c\/th\u003e\n\n\u003ctd\u003eUnique color pattern per tumbled stone; the two formats allow choosing the size according to use\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow mookaite colors are formed\u003c\/h2\u003e\n\u003cp\u003eMookaite is a sedimentary rock—technically a siliceous siltstone—formed during the Cretaceous period (about 100 million years ago) from the siliceous skeletons of radiolarians, single-celled marine microorganisms that accumulated on the bottom of the Eromannga Sea when that area of Western Australia was covered by saltwater.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — 6-7 Mohs hardness, among the highest for jaspers; withstands medium gauges (0.8-1 mm) without risk of marking the surface; large formats (37×24 mm) have enough presence for a main pendant\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacramé\u003c\/strong\u003e — the warm red-ocher palette works with brown, ocher, or terracotta waxed thread; the small format (24×18 mm) is suitable for bracelets and earrings, the large for statement pendants\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone\u003c\/strong\u003e — mookaite is a classic for pocket stones due to its high hardness and variety of stimulating colors; its warm palette makes it one of the most recognized in Australian collections\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollecting\u003c\/strong\u003e — a unique piece due to its exclusive origin: there is no authentic mookaite from another deposit, which makes it a specimen of verifiable provenance and low substitutability\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eMookaite in cultural tradition\u003c\/h2\u003e\n\u003cp\u003eMookaite is named after Mooka Creek (in Noongar language: \"living waters\" or \"running waters\") in Kennedy National Park, Western Australia.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to recognize genuine mookaite\u003c\/h2\u003e\n\u003cp\u003eAuthentic mookaite shows the characteristic blend of burgundy red and ocher-cream with blurred edges between the color zones, a result of its sedimentary layered origin.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhy is it spelled \"mokaita\" and \"mookaita\"?\u003c\/h3\u003e\n\u003cp\u003eThe original English spelling is \"mookaite,\" taken from the toponym Mooka Creek. The version \"mokaita\"—with a single 'o'—is the most common phonetic adaptation in Spanish.\u003c\/p\u003e\n\n\u003ch3\u003eDo the two formats have the same color palette?\u003c\/h3\u003e\n\u003cp\u003eThey come from the same deposit, but the color pattern of each tumbled stone is distinct regardless of the format.\u003c\/p\u003e\n\n\u003ch3\u003eIs it durable for daily wear jewelry?\u003c\/h3\u003e\n\u003cp\u003eThe 6-7 Mohs hardness makes it suitable for pendants, earrings, and wire-wrapped bracelets.\u003c\/p\u003e\n\n\u003ch3\u003eDoes mookaite exist in other countries?\u003c\/h3\u003e\n\u003cp\u003eNo. Mookaite as a geological material defined by its specific composition and color palette is exclusive to the Windalia formation of Mooka Creek.\u003c\/p\u003e\n\n\u003ch3\u003eWhere can I read more about mookaite jasper?\u003c\/h3\u003e\n\u003cp\u003eIn the encyclopedia article \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/mookaite\"\u003eMookaite — properties, meaning, and uses\u003c\/a\u003e, you will find complete mineralogical and cultural information.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I care for it?\u003c\/h3\u003e\u003c!--nl--\"\u003e\u003cp\u003eClean with water and a soft cloth. Its high hardness makes it durable; avoid sharp impacts against angles. More in the \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ejewelry care guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eMore about mookaite: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/mookaite\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/piedrasdemeditacion\"\u003emeditation stones\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1x Piedra Roja","offer_id":40424197455915,"sku":"","price":3.5,"currency_code":"EUR","in_stock":true},{"title":"1x Yellow Stone","offer_id":40424197488683,"sku":"","price":3.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/mookaite-jasper-tumblestones-404353.webp?v=1699531313"},{"product_id":"opalo-rosa-andino-rodados","title":"Andean Pink Opal Tumbled Stones","description":"\u003cp\u003eTumbled Andean pink opal from the volcanic deposits of Peru, in its opaque pale pink to peach variety. Size between 28 and 52 mm, weight between 15 and 20 grams.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eAndean pink opal (hydrated silica, SiO₂·nH₂O; opaque opal-CT variety, no play-of-color)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003ePale pink to peach with pearly white streaks; subtle tone variations per piece\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e28-52 mm long; 15-20 g weight\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; smoothly rounded surface\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polish with pearly luster\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e5.5-6 Mohs (compact opal) — suitable for pendants and earrings; for rings, we recommend settings that protect the edges\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003ePeruvian Andes, main deposit in Canta (Lima province)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The pink color comes from traces of manganese and iron in the native composition of the opal\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece Type\u003c\/th\u003e\n\n\u003ctd\u003eUnique tone and streaks per tumbled stone; intuitive selection within the size range\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Andean Opal is Pink\u003c\/h2\u003e\n\u003cp\u003eAndean opal is a variety of hydrated silica (opal-CT, with partially crystallized silica structure) formed in volcanic hydrothermal environments characteristic of the Peruvian Andean mountain range. Unlike Australian or Ethiopian opal —which exhibit iridescence (play-of-color) due to their internal structure of regularly ordered silica spheres— Andean pink opal has a less organized structure that produces a uniform opaque appearance.\u003c\/p\u003e\n\n\u003ch2\u003eWhat This Format Is Good For\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — the 5.5-6 Mohs hardness requires fine gauge (0.6-0.8 mm) and wraps that support the outline without concentrated pressure on the surface; large formats (\u0026gt;40 mm) are especially good for statement pendants\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacrame\u003c\/strong\u003e — the pink palette fits into earth and nude color compositions; the 15-20 g weight works well for string pendants and wide bracelets\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone\u003c\/strong\u003e — one of the few accessible non-precious opals in tumbled form; the pearly texture and ergonomic size are comfortable for daily carry\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollection of Andean minerals\u003c\/strong\u003e — a representative piece of Peruvian volcanic mineralogy; interesting alongside rhodochrosite and Andean tourmaline in thematic South American collections\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eAndean Pink Opal in Cultural Tradition\u003c\/h2\u003e\n\u003cp\u003eSixteenth-century Spanish colonial chronicles record the use of soft pink stones —including Andean opal— as low-rank decorative material in Cusco markets, where they were generically called \u003cem\u003equyllur rumi\u003c\/em\u003e (\"luminous stone\" in Quechua). In 19th-century Europe, Andean opal reached the gem market under the name \"Peruvian opal,\" popularized in Victorian jewelry as an accessible alternative to the newly discovered Australian opal (1849) and Mexican fire opal. In modern crystal therapy readings, it is associated with emotional calm and gentle communication, symbolic readings consistent with the pink color and matte texture of the mineral.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eHow to Recognize Genuine Andean Pink Opal\u003c\/h2\u003e\n\u003cp\u003eGenuine Andean pink opal has a pink color with subtle internal gradients and a slightly porous texture to the touch, with a pearly-matte (not vitreous) luster. Pink glass imitations have a uniform vitreous luster and a very smooth surface. Plastic is noticeably lighter (density ~1.2 g\/cm³ compared to 2.0-2.2 for opal) and scratches with a steel blade. Andean opal can be dyed to intensify the color: the sign is excessively uniform saturation without gradients and possible discoloration in cracks or edges when wet.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eDoes it have play-of-color like Australian opal?\u003c\/h3\u003e\n\u003cp\u003eNo. Andean pink opal is a common opal (non-precious opal) without play-of-color (iridescence).\u003c\/p\u003e\n\n\u003ch3\u003eIs it sensitive to humidity changes?\u003c\/h3\u003e\n\u003cp\u003eOpal is a hydrated silica that can lose water in very dry environments or with prolonged heat, which.\u003c\/p\u003e\n\n\u003ch3\u003eHow big is each tumbled stone exactly?\u003c\/h3\u003e\n\u003cp\u003eBetween 28 and 52 mm long, with variations within the batch. Selection is made intuitively; the weight (15-20.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40479820415019,"sku":"","price":7.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/tumbled-peruvian-pink-opal-685250.webp?v=1699531462"},{"product_id":"rodados-de-cuarzo-fresa","title":"Strawberry Quartz Tumbled Stones","description":"\u003cp\u003eStrawberry quartz tumbled stones—macrocrystalline quartz with hematite and goethite inclusions that stain the matrix from deep red to raspberry—in 3-4 × 2-3 cm size.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eMacrocrystalline quartz (SiO₂) with hematite and goethite inclusions (commercial name: strawberry quartz)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eVivid red to raspberry red with dark hematite spots and veins; saturation variations per piece\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e3-4 × 2-3 cm (natural variations within the batch)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; rounded outline\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polish with slight natural quartz luster\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs (matrix quartz) — one of the most scratch-resistant tumbled stones in daily use\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil (more saturated variety) and Madagascar (with possible green epidote inclusions)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eNo treatment. The red color comes from native iron oxide inclusions (hematite, goethite) in the quartz matrix\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece type\u003c\/th\u003e\n\n\u003ctd\u003eUnique inclusion distribution per tumbled stone; batch selection\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow the red color is formed\u003c\/h2\u003e\n\u003cp\u003eStrawberry quartz is macrocrystalline quartz in which particles of hematite (Fe₂O₃) and goethite (FeO·OH)—two iron oxides—were incorporated during its formation, trapped in the crystal lattice or deposited in internal microfractures. Hematite contributes the deep red and crimson tones; goethite adds brown and golden nuances in transitional areas. The result is a translucent stone in the pure areas and opaque red where the oxide is concentrated.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this format is good for\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrapping\u003c\/strong\u003e — 7 Mohs hardness, the highest among common quartz types; withstands medium and thick gauges (0.8-1.5 mm) without risk of marking the surface; the 3-4 cm size offers space for elaborate pendant compositions\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacrame\u003c\/strong\u003e — the medium weight and rounded outline are easily tied without a cap; the intense red stands out against white, beige, or black thread\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone\u003c\/strong\u003e — the high hardness makes strawberry quartz one of the most durable tumbled stones for daily use; it withstands everyday friction against keys and surfaces without micro-scratches\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollection of iron oxides in quartz\u003c\/strong\u003e — its unusual color among quartz varieties makes it stand out in collections of red minerals alongside carnelian, red jasper, and unfaceted ruby\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eStrawberry quartz in cultural tradition\u003c\/h2\u003e\n\u003cp\u003eQuartz with iron oxide inclusions has been worked since antiquity under different names depending on color saturation and transparency: carnelian (orange-red translucent, microcrystalline quartz), red jasper (opaque), and red smoky quartz (with partial transparency). The name \"strawberry quartz\"—\u003cem\u003ecuarzo fresa\u003c\/em\u003e in Spanish—became popular in the 1980s gem market to describe macrocrystalline quartz with intense raspberry-red hematite, distinguishing it from the more orange carnelian. In modern crystal therapy readings, it is associated with vitality and solar energy, extending the symbolic associations of the color red with dynamism and action found in multiple cultural traditions.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eHow to recognize genuine strawberry quartz\u003c\/h2\u003e\n\u003cp\u003eAuthentic strawberry quartz shows variations in color saturation and distribution: more translucent areas and redder areas, with irregular hematite spots and veins. Under 10× magnification, inclusions appear as internal particles, not as a surface dye. Dyed quartz shows dye concentration in microfractures (well-defined dark edges) and a uniformly colored external surface. Irradiated quartz tends to a more uniform and saturated red than natural.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eIs it the same as carnelian?\u003c\/h3\u003e\n\u003cp\u003eNo. Carnelian is a variety of chalcedony (microcrystalline quartz, homogeneous milky texture) with orange-red and high hematite inclusions.\u003c\/p\u003e\n\n\u003ch3\u003eIs it durable for everyday jewelry?\u003c\/h3\u003e\n\u003cp\u003eIts 7 Mohs hardness makes it suitable for wire-wrapped or macrame pendants, earrings, and bracelets.\u003c\/p\u003e\n\n\u003ch3\u003eAre the dark spots and marks defects?\u003c\/h3\u003e\n\u003cp\u003eNo. They are concentrations of hematite or goethite that define the visual character of the mineral.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40479987302443,"sku":"","price":3.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/tumbled-strawberry-quartz-crystals-171371.webp?v=1699531436"},{"product_id":"rodados-de-serpentina","title":"Serpentine Tumbled Stones","description":"\u003cp\u003eSerpentine tumbled stones in their most characteristic green expression, with white and brown veins that reflect the mixed composition of the mineral group.\u003c\/p\u003e\n\n\u003ch2\u003eMaterial Data Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eSerpentine (group of Mg and Fe phyllosilicates: antigorite, lizardite, chrysotile)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eColor\u003c\/th\u003e\n\n\u003ctd\u003eMedium to dark green with white, beige, and brown veins; natural variations per piece\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSize\u003c\/th\u003e\n\n\u003ctd\u003e22-31 mm diameter; 8-18 g weight\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape\u003c\/th\u003e\n\n\u003ctd\u003eTumbled; smoothly rounded outline\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eSmooth polish with a slightly oily luster\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e2.5-5.5 Mohs depending on the predominant variety — in antigorite areas (harder) greater resistance; in lizardite or chrysotile areas, more delicate\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eMain deposits: India, China, South Africa, Italy (Val d'Aosta); lapidary wholesale market\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated. The green color comes from the native chemical composition (Mg and Fe in the phyllosilicate lattice)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePiece type\u003c\/th\u003e\n\n\u003ctd\u003eUnique veins and color proportion per tumbled stone; shipped by intuitive selection within the size range\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eHow the Serpentine Group Forms\u003c\/h2\u003e\n\u003cp\u003eSerpentine is not a single mineral but a group of phyllosilicates resulting from the hydrothermal alteration of ultramafic rocks (peridotites, dunites) rich in magnesium and iron.\u003c\/p\u003e\n\n\u003ch2\u003eWhat this Format is Good For\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire wrap\u003c\/strong\u003e — variable hardness requires fine gauge (0.6-0.8 mm) and avoiding concentrated pressure on softer areas; the 22-31 mm size provides good margin for pendants and earrings\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMacrame\u003c\/strong\u003e — light weight (8-18 g) suitable for waxed cord pendants and wide bracelets; the soft green contrasts well with cream, natural, or terracotta thread\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePocket stone \/ meditation stone\u003c\/strong\u003e — the compact format and pleasant tactile texture make this tumbled stone a comfortable piece for daily wear; historically associated with transition and adjustment\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCollecting\u003c\/strong\u003e — the variability of subvarieties (antigorite, bowenite, williamsite) means that pieces from the same batch can have different textures and hardnesses; interesting for phyllosilicate collections\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eSerpentine in Cultural Tradition\u003c\/h2\u003e\n\u003cp\u003eSerpentine was one of the preferred materials for tools and ornaments in Neolithic cultures of Europe and Asia before the advent of metal. The Maori of New Zealand called greenstones \u003cem\u003epounamu\u003c\/em\u003e —a group that includes serpentine and nephrite— and used them in hei-tiki (ancestral identity pendants) and high-ranking tools. In the classical Mediterranean world, the Latin name \u003cem\u003eserpentinus\u003c\/em\u003e (\"snake-like\") alluded to the sinuous veins reminiscent of reptile scales; Italian serpentine from Val d'Aosta was used in pavements and wall coverings of Roman buildings.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to Recognize Genuine Serpentine\u003c\/h2\u003e\n\u003cp\u003eThe oily or resinous luster on a green background is the most immediate sign: unlike nephrite jade (more intense vitreous luster) or malachite (concentric bands), serpentine has a duller and waxy appearance.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eIs serpentine toxic due to chrysotile?\u003c\/h3\u003e\n\u003cp\u003eFine chrysotile dust (generated by dry cutting or sanding) is a dangerous asbestiform fiber when inhaled in industrial contexts.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between serpentine and jade?\u003c\/h3\u003e\n\u003cp\u003eGeological jade is jadeite (pyroxene) or nephrite (amphibole), with a hardness of 6-6.5 Mohs and a density of 3.2-3.5 g\/cm³.\u003c\/p\u003e\n\n\u003ch3\u003eIs it resistant to water contact?\u003c\/h3\u003e\n\u003cp\u003eIt tolerates brief contact. Clean with a slightly damp cloth and dry thoroughly.\u003c\/p\u003e\n\n\u003ch3\u003eHow much does it weigh exactly?\u003c\/h3\u003e\n\u003cp\u003eBetween 8 and 18 grams depending on the size of the tumbled stone. Those at the lower end of the range (22 mm) weigh around 8-10 g; those at the upper end (31 mm) reach 15-18 g.\u003c\/p\u003e\n\n\u003ch3\u003eHow do you care for it?\u003c\/h3\u003e\n\u003cp\u003eClean with a soft cloth slightly dampened with water. Store separately from harder stones to prevent micro-scratching. Avoid mild acids and prolonged exposure to intense sunlight. More in the \u003ca href=\"\/en\/pages\/cuidado-de-tus-joyas\"\u003ejewelry care guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eSee also: \u003ca href=\"\/en\/collections\/rodados\"\u003eall tumbled stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/piedrasdemeditacion\"\u003emeditation stones\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003ecabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"1x Piedra","offer_id":40485501927467,"sku":"","price":1.5,"currency_code":"EUR","in_stock":true},{"title":"5x Piedras","offer_id":40485501960235,"sku":"","price":6.5,"currency_code":"EUR","in_stock":true},{"title":"10x Piedras","offer_id":40485501993003,"sku":"","price":12.0,"currency_code":"EUR","in_stock":true},{"title":"20x Piedras","offer_id":40485502025771,"sku":"","price":20.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/tumbled-serpentine-stone-467467.webp?v=1699531488"},{"product_id":"amatista-chevron-puntas-en-bruto","title":"Amethyst Chevron Rough Points","description":"\u003cp\u003eNatural chevron amethyst points with the characteristic V-shaped pattern of purple and white bands. Rough fragments direct from the deposit, unpolished and untreated, with visible crystalline terminations. Collector's material from Brazil.\u003c\/p\u003e\n\n\u003ch2\u003ePiece Details\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eMineral\u003c\/th\u003e\n\n\u003ctd\u003eChevron Amethyst (quartz with alternating inclusions of amethyst and milky quartz)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDimensions\u003c\/th\u003e\n\n\u003ctd\u003eVariable · ±0.5 mm due to being natural pieces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eShape and Back\u003c\/th\u003e\n\n\u003ctd\u003eNatural rough point, unpolished\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFinish\u003c\/th\u003e\n\n\u003ctd\u003eNatural rough\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHardness\u003c\/th\u003e\n\n\u003ctd\u003e7 Mohs — resistant to everyday wear; terminations are fragile against direct impacts\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eOrigin\u003c\/th\u003e\n\n\u003ctd\u003eBrazil\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTreatment\u003c\/th\u003e\n\n\u003ctd\u003eUntreated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eType of Piece\u003c\/th\u003e\n\n\u003ctd\u003eCollection — each specimen varies in size and pattern\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003eThis Specific Piece\u003c\/h2\u003e\n\u003cp\u003eThe chevron pattern is not an added decorative feature: it is the stratigraphic record of crystal growth. Each V-band documents a different growth episode, with slightly different geochemical conditions that changed the iron concentration in the hydrothermal solution and, with it, the color of the resulting quartz.\u003c\/p\u003e\n\u003cp\u003eBy keeping the material rough, the crystalline termination remains intact. The faces of the rhombohedron that close the crystal can be distinguished at the tip, and in some specimens, micro-inclusions of manganese dioxide locally darken the violet band.\u003c\/p\u003e\n\n\u003ch2\u003eHow Chevron Bands Form\u003c\/h2\u003e\n\u003cp\u003eChevron quartz grows in low-temperature hydrothermal cavities from silica-rich solutions. When geochemical conditions oscillate rhythmically — changes in pH, iron concentration, or temperature — the crystal alternates between phases of colorless quartz and phases of violet quartz (amethyst).\u003c\/p\u003e\n\n\u003ch2\u003eUses of Rough Points\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMineralogical Collection\u003c\/strong\u003e — specimens showing the real structure of quartz without lapidary intervention.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWorkshop Reference\u003c\/strong\u003e — useful for observing growth orientation before deciding on the cut or cabochon shape.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWire Wrap\u003c\/strong\u003e — medium-sized points (from approx. 4-5 cm) are directly wrapped with 20-22 gauge silver or copper wire without prior polishing.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eAmethyst in Lapidary Tradition\u003c\/h2\u003e\n\u003cp\u003eThe word \u003cem\u003eamethyst\u003c\/em\u003e derives from the Greek \u003cem\u003eamethystos\u003c\/em\u003e (\"not intoxicated\"): in classical antiquity, it was carved into cups under the belief that it moderated the effects of wine. In Egypt and Rome, it was used in cameos and seals, taking advantage of its hardness of 7 and its transparency in clean varieties.\u003c\/p\u003e\n\u003cp\u003eIn crystal tradition, amethyst is associated with mental calm and clarity of thought. The chevron variant, with its contrast between purple and white bands, is described as a mineral of transition or duality.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHow to Recognize Genuine Chevron Amethyst\u003c\/h2\u003e\n\u003cp\u003eAuthentic chevron amethyst shows V-bands with natural variations in thickness when observing the cross-section. Synthetic imitations have more uniform and parallel bands. Under a 10× loupe, the violet zone shows liquid or gas micro-inclusions characteristic of hydrothermal growth. Violet-dyed quartz lacks the V-pattern and concentrates color in cracks instead of crystal growth planes.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs chevron amethyst dyed or treated?\u003c\/h3\u003e\u003cp\u003eNo. The violet color and white bands are a direct result of the chemical composition of the crystal during its hydrothermal formation, with no detectable subsequent treatment. Statement based on lapidary observation; the piece does not include formal gemological certification.\u003c\/p\u003e\n\u003ch3\u003eCan this rough point be used for wire wrapping?\u003c\/h3\u003e\u003cp\u003eYes. Medium-sized points are suitable for wrapping with 20-22 gauge copper or silver wire. The crystalline termination acts as a natural focal point of the pendant without the need for prior polishing.\u003c\/p\u003e\n\u003ch3\u003eDoes the size vary between pieces?\u003c\/h3\u003e\u003cp\u003eYes. As it is rough material, each specimen has its own dimensions. The variation between pieces from the same batch can exceed ±0.5 mm. Each unit is an individual specimen.\u003c\/p\u003e\n\n\u003cp\u003eMore about amethyst: \u003ca href=\"\/en\/blogs\/propiedades-de-los-minerales\/amatista\"\u003eproperties, meaning, and uses\u003c\/a\u003e. See also: \u003ca href=\"\/en\/collections\/minerales-en-bruto\"\u003erough minerals\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/cabujones\"\u003elapidary cabochons\u003c\/a\u003e.\u003c\/p\u003e","brand":"Anima Mundi Crystals","offers":[{"title":"Default Title","offer_id":40480137478187,"sku":"","price":5.1,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/products\/raw-chevron-amethyst-points-266025.webp?v=1699531350"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/8818\/4355\/collections\/tumble-stones-564351.webp?v=1699531091","url":"https:\/\/animamundicrystals.com\/en\/collections\/rodados.oembed?page=2","provider":"Anima Mundi Crystals","version":"1.0","type":"link"}