11.31ct ETW Earth-Mined Greenish Blue Grandidierite – Oval Cut, Rare Gemstone

11.31ct ETW Earth-Mined Greenish Blue Grandidierite – Oval Cut, Rare Gemstone

This impressive 11.31-carat earth-mined grandidierite from Madagascar features distinctive greenish blue coloration and an elegant oval cut. Its substantial size and rare mineral identity make it an appealing choice for gemstone collectors and custom jewelry designs.

Specifications:

Gemstone: Greenish Blue Grandidierite
Carat Weight: 11.31ct ETW
Cut: Oval Cut
Dimensions: 17.2 x 13.7 x 7.0 mm
Clarity: Opaque
Treatment: Unheated
Origin: Madagascar, Africa
Condition: New

Earth-mined Madagascar grandidierite weighing 11.31ct ETW in an oval cut, featuring opaque clarity, unheated character, and distinctive greenish blue coloration.

Grandidierite is a rare magnesium aluminum borosilicate mineral prized for its attractive blue-green hues and limited geographic occurrence. Its distinctive coloration ranges from greenish blue to deeper teal, making it particularly interesting to mineral enthusiasts and gemstone collectors.

Madagascar is the best-known source of gem-quality grandidierite, producing specimens with varying degrees of transparency and color saturation. The mineral was first discovered in southern Madagascar and remains a sought-after collector gemstone.

This specimen is unheated and untreated, retaining its naturally occurring coloration without artificial enhancement. Its opaque clarity gives it a solid appearance, emphasizing its color and polished form rather than transparent brilliance.

At 11.31 carats and measuring 17.2 x 13.7 x 7.0 mm, this gemstone offers impressive visual presence. Its classic oval shape makes it suitable for a custom statement pendant or a distinctive collector's display.

Grandidierite has a Mohs hardness of approximately 7 to 7.5, offering reasonable durability with appropriate care. A protective setting and careful handling are recommended.

This individual Madagascan grandidierite combines impressive size, unusual greenish blue coloration, and the rarity of a naturally occurring collector gemstone.

(Stock Code: ABMM)

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