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4.75 Ct Incredible Natural Grandidierite Gemstone SKU A19
- SKU
- Dimensioni (mm)
- 14.570 x 10.520 x 5.530mm
- Peso (cts)
- 4.750
- Treatment
- No Treatment
- Colori
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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
- Dimensioni (mm)
- 14.570 x 10.520 x 5.530 mm
- Peso (cts)
- 4.750
- Treatment
- No Treatment
- Colori
-
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
| Fornitore di spedizioni | Spedizione a Thailand | Spedizione nel resto del mondo |
|---|---|---|
| Standard Shipping - Tracked | $10.00 / 15 giorni | $13.00 / 21 giorni |
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Thailand
Standard Shipping - Tracked è scontato a $15.00 sugli ordini con 3 o più articoli
Resto del mondo
Standard Shipping - Tracked è scontato a $25.00 sugli ordini con 2 o più articoli
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||
| DHL | $35.00 / 10 giorni | $35.00 / 10 giorni |
|
Thailand
DHL è scontato a $30.00 sugli ordini con 2 o più articoli
Resto del mondo
DHL è scontato a $30.00 sugli ordini con 2 o più articoli
|
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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.
Verifica
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Descrizione Preciso
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Immagini accurate
Comments
The Verified Seller has provided accurate and complete information for this item including weight, dimensions, and treatment.
