Almandine garnet (Fe₃Al₂(SiO₄)₃) in tumbled form with the intense red to dark garnet red of the variety.
Material Data Sheet
| Mineral |
Almandine Garnet (nesosilicate, Fe₃Al₂(SiO₄)₃, pyralspite group) |
| Color |
Dark red to intense garnet red; occasionally with violet hues depending on the proportion of iron and manganese |
| Size |
20-30 mm diameter |
| Shape |
Tumbled; rounded outline with vitreous luster |
| Hardness |
7-7.5 Mohs |
| Crystal System |
Cubic (isometric); natural crystals in rhombic dodecahedron or trapezohedron |
| Density |
~4.3 g/cm³ |
| Origin |
India (Rajasthan, Odisha, main lapidary market), Brazil, Mozambique |
| Treatment |
Untreated. The red color comes from the native chemical composition (iron in the silicate structure) |
| Piece Type |
Lot; intuitive selection by saturation and brightness |
How Almandine Garnet is Formed
Almandine 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).
What This Format is Good For
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Wire wrap — 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
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Macramé — 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
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Pocket stone — the medium-high density (~4.3 g/cm³) provides a solid, well-grounded feel; historically associated with vitality and determination
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Garnet collecting — almandine is the reference variety to compare with rhodolite garnet (more translucent and violet), spessartine (orange-mandarin), and pyrope (purer red without violet hues)
Garnet in Cultural Tradition
Garnet is one of the minerals with the most continuous documented use. The Romans called it carbunculus (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.
The 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.
How to Recognize Genuine Almandine Garnet
Authentic 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.
Frequently Asked Questions
What is the difference between almandine garnet and rhodolite garnet?
Rhodolite is an intermediate variety between pyrope and almandine, with less iron and more magnesium; it has a more violet-pink hue and greater transparency.
Can it be used in jewelry?
Yes. 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 jewelry care guide for maintenance recommendations.
Does the "garnet color" in fabrics correspond to almandine?
Yes. 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.
Is it magnetic?
Almandine with high iron content may show a slight paramagnetic attraction to a very strong magnet, but under normal conditions, it does not adhere.
How is it cared for?
Clean 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 jewelry care guide.
See also: all tumbled stones · faceted gems · natural stone jewelry.
