Extreamly Rarest 1.55 Ct Natural Blue Grandidierite Madagascar Mined
- UGS
- Dimensions (mm)
- 8.830 x 6.930 x 3.990mm
- Poids (cts)
- 1.550
- Treatment
- No Treatment
- 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
- UGS
- Dimensions (mm)
- 8.830 x 6.930 x 3.990 mm
- Poids (cts)
- 1.550
- Treatment
- No Treatment
- 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 |
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Standard Shipping - Tracked | $15.00 / 7 | $15.00 / 21 |
Thailand
Standard Shipping - Tracked bénéficie d'une remise de $15.00 sur les commandes contenant 2 ou plus d'articles
Reste du monde
Standard Shipping - Tracked bénéficie d'une remise de $15.00 sur les commandes contenant 2 ou plus d'articles
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DHL | $30.00 / 4 | $30.00 / 7 |
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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Neutre
I really don't understand this seller. He only shipped when threatened by the GRA managers I turned to. However, the stone arrived and is beautiful, albeit with some cracks not visible in the announcement. Be careful if you buy from them and be strict.
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Positif
Paid and shipped - no feedback left after 100 days
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Positif
Beautiful Amethyst!
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Positif
Paid and shipped - no feedback left after 100 days
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