Large format (27–45 mm) blue aquamarine cabochon, high transparency beryl with stable blue color. Each variant is a unique piece with its own dimensions, selected from a wholesale gem market for jewelry.
Piece Details
| Mineral |
Aquamarine (beryl, Be₃Al₂Si₆O₁₈, blue variety due to Fe²⁺) |
| Dimensions |
Variable by variant: 27×23×9 mm to 45×28×6 mm |
| Shape and Back |
Freeform oval, flat back |
| Finish |
Mirror polish |
| Hardness |
7.5–8 Mohs — suitable for rings and pendants; we recommend a closed bezel setting to protect the edge |
| Origin |
Material acquired from a wholesale lapidary market |
| Treatment |
No detectable treatment. Statement based on observation; piece without formal gemological certification. |
| Piece Type |
Available in 4 variants — each is a unique piece |
This specific piece
The large format—between 27 and 45 mm on its major axis—offers a broad visual field that allows the stone to speak for itself without the need for complex metal elements. The blue tone remains homogeneous under natural and incandescent light, without the gradation bands typical of gems subjected to artificial irradiation.
Low-depth variants (6 mm) provide the maximum visible color area with less weight, making it easier to balance large pendants without overloading the chain. Thicker variants (9–10 mm) have greater volume for sculptural ring or brooch pieces.
How Aquamarine's Blue Color is Formed
Aquamarine is the blue variety of beryl, the same mineral species as emerald (green) and morganite (pink). The blue color is produced by the presence of ferrous iron (Fe²⁺) in the hexagonal crystal lattice. Aquamarine crystallizes in granitic pegmatites at high pressures, often in long prismatic crystals that allow for large cabochons with uniform material. Unlike blue topaz—which is usually irradiated to achieve its color—aquamarine maintains its stable hue without treatment.
What setting it works for
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Bezel-set pendant (925 silver or gold) — the large format creates highly visible statement pieces; the bezel frames the color without competing with it.
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Cocktail ring in 925 silver — 7.5–8 Mohs hardness makes aquamarine suitable for occasional wear rings in a bezel or shoulder setting.
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Wire wrap — low-profile variants facilitate working with fine silver wire without the stone being excessively prominent.
Aquamarine in lapidary tradition
The name derives from the Latin aqua marina — sea water —, and its use in jewelry is documented since ancient Greece, where it was carved into cameos and seals.
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 aquamarine
Natural aquamarine exhibits uniform transparency with eventual tubular inclusions parallel to the crystal axis — a sign of authenticity. Blue glass lacks these inclusions and has an excessively uniform luster. Beryl shows weak double refraction visible under magnification in thick pieces. The color of natural aquamarine is stable to sunlight; treated blue quartz can fade over time.
Frequently Asked Questions
Is it natural or synthetic aquamarine?
It is natural aquamarine from a wholesale gem catalog. It does not include an independent gemological certificate; if you require formal certification for a high-value piece, we recommend sending it to a laboratory once the variant has been selected.
Is it color treated?
No detectable treatment. Aquamarine can be heated to remove greenish tones, but no indicators of this process are observed in these pieces. Statement based on lapidary observation; without formal gemological certification.
What type of jewelry is the large format suitable for?
The 27–45 mm format is designed for statement pendants or cocktail rings. For earrings, smaller formats from other references in the collection are more suitable.
More about aquamarine: properties and uses of blue beryl. See also: cabochon collection.
