12.86ct ETW Earth-Mined Greenish Blue Grandidierite – Oval Cut, Rare Gemstone

12.86ct ETW Earth-Mined Greenish Blue Grandidierite – Oval Cut, Rare Gemstone

This impressive 12.86-carat earth-mined grandidierite from Madagascar features distinctive greenish blue coloration and an elegant oval cut. Its substantial size, rare mineral identity, and unique natural appearance make it an interesting addition to a gemstone collection or custom jewelry design.

Specifications:

Gemstone: Greenish Blue Grandidierite
Carat Weight: 12.86ct ETW
Cut: Oval Cut
Dimensions: 16.2 x 12.5 x 10.0 mm
Clarity: Opaque
Treatment: Unheated
Origin: Madagascar
Condition: New

Earth-mined greenish blue grandidierite weighing 12.86ct ETW in an oval cut from Madagascar, featuring opaque clarity and unheated character.

Grandidierite is a rare magnesium aluminum borosilicate mineral prized for its distinctive blue-green coloration and limited availability. Its unusual mineral composition and geological rarity make it particularly interesting to gemstone enthusiasts and mineral collectors.

This specimen displays attractive greenish blue tones in a classic oval shape. Its opaque clarity emphasizes the gemstone's natural color and distinctive internal patterns rather than transparent brilliance.

Madagascar is the world's most recognized source of gem-quality grandidierite, producing specimens that range from translucent to opaque. This gemstone is unheated, retaining its naturally occurring coloration without heat enhancement.

At 12.86 carats and measuring 16.2 x 12.5 x 10.0 mm, this gemstone offers substantial visual presence. Its oval shape provides versatile proportions for a custom pendant, statement jewelry design, or collector's display.

Grandidierite has a Mohs hardness of approximately 7 to 7.5, offering reasonable durability for carefully designed jewelry. Protective settings and gentle handling are recommended.

This individual Madagascan grandidierite combines impressive size, distinctive greenish blue coloration, and the appeal of a rare earth-mined mineral.

(Stock Code: ABMM)

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