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3.80 Ct Incredible Natural Grandidierite Gemstone SKU A16
- UGS
- Dimensions (mm)
- 12.000 x 9.700 x 4.480mm
- Poids (cts)
- 3.800
- Couleurs
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Grandidierite was first discovered in 1902 in Madagascar by Alfred Lacroix, a French mineralogist. Lacroix named the mineral in honor of French explorer and naturalist Alfred Grandidier (1836–1912), the first authority on the natural history of Madagascar.
Since its initial discovery, samples of Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka. But the few gem quality specimens have come mainly from Madagascar.
Gem-quality Grandidierite is extremely rare, and it often appears on the list of the 10 rarest varieties in the world, along with gems like jeremejevite, painite, benitoite and taafeite.
Gemologically, Grandidierite is a magnesium aluminum borosilicate. It has a hardness of 7 to 7.5 on the Mohs scale, similar to garnet; a density of 2.85 to 3.00, in the approximate range of tourmaline; and a refractive index of 1.590-1.623.
Name: GRANDIDIERITE GEMSTONE
Place of Origin: MADAGASCAR
TREATMENT: NATURAL
- UGS
- Dimensions (mm)
- 12.000 x 9.700 x 4.480 mm
- Poids (cts)
- 3.800
- Couleurs
-
Grandidierite was first discovered in 1902 in Madagascar by Alfred Lacroix, a French mineralogist. Lacroix named the mineral in honor of French explorer and naturalist Alfred Grandidier (1836–1912), the first authority on the natural history of Madagascar.
Since its initial discovery, samples of Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka. But the few gem quality specimens have come mainly from Madagascar.
Gem-quality Grandidierite is extremely rare, and it often appears on the list of the 10 rarest varieties in the world, along with gems like jeremejevite, painite, benitoite and taafeite.
Gemologically, Grandidierite is a magnesium aluminum borosilicate. It has a hardness of 7 to 7.5 on the Mohs scale, similar to garnet; a density of 2.85 to 3.00, in the approximate range of tourmaline; and a refractive index of 1.590-1.623.
Name: GRANDIDIERITE GEMSTONE
Place of Origin: MADAGASCAR
TREATMENT: NATURAL
| Fournisseur d'expédition | Expédition vers Thailand | Expédition dans le reste du monde |
|---|---|---|
| Standard Shipping - Tracked | $10.00 / 15 | $13.00 / 21 |
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Thailand
Standard Shipping - Tracked bénéficie d'une remise de $15.00 sur les commandes contenant 3 ou plus d'articles
Reste du monde
Standard Shipping - Tracked bénéficie d'une remise de $25.00 sur les commandes contenant 2 ou plus d'articles
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| DHL | $35.00 / 10 | $35.00 / 10 |
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Thailand
DHL bénéficie d'une remise de $30.00 sur les commandes contenant 2 ou plus d'articles
Reste du monde
DHL bénéficie d'une remise de $30.00 sur les commandes contenant 2 ou plus d'articles
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PositifDespite the beveled pavilion, the stone shines due to its excellent cut.
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Positif
The Gem is quite pale, but beautiful.
Audit
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Description Précis
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Images précises
Comments
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