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4.75 Ct Incredible Natural Grandidierite Gemstone SKU A19
- SKU
- Dimensiones (mm)
- 14.570 x 10.520 x 5.530mm
- Peso (cts)
- 4.750
- Treatment
- No Treatment
- Colores
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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
- SKU
- Dimensiones (mm)
- 14.570 x 10.520 x 5.530 mm
- Peso (cts)
- 4.750
- Treatment
- No Treatment
- Colores
-
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
| Proveedor de envío | Envío a Thailand | Envíos al resto del mundo |
|---|---|---|
| Standard Shipping - Tracked | $10.00 / 15 días días | $13.00 / 21 días días |
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Thailand
Standard Shipping - Tracked tiene descuento a $15.00 en pedidos con 3 o más artículos
Resto del mundo
Standard Shipping - Tracked tiene descuento a $25.00 en pedidos con 2 o más artículos
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| DHL | $35.00 / 10 días días | $35.00 / 10 días días |
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Thailand
DHL tiene descuento a $30.00 en pedidos con 2 o más artículos
Resto del mundo
DHL tiene descuento a $30.00 en pedidos con 2 o más artículos
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PositivoVery good color. Promptly shipped. Arrived with no documentation.
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Positivo
An utterly angelic and charming sparkler, and incredibly clean. It arrived quickly too. Thank you so much
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Positivo
Even lovelier in real life. A real beauty. Thanks.
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Positivo
Despite the beveled pavilion, the stone shines due to its excellent cut.
Auditoría
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Descripción Precisa
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Imágenes precisas
Comments
The Verified Seller has provided accurate and complete information for this item including weight, dimensions, and treatment.
