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4.75 Ct Incredible Natural Grandidierite Gemstone SKU A19
- SKU
- 寸法(mm)
- 14.570 x 10.520 x 5.530mm
- 重さ (CT)
- 4.750
- Treatment
- No Treatment
- 色
-
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
- 寸法(mm)
- 14.570 x 10.520 x 5.530 mm
- 重さ (CT)
- 4.750
- Treatment
- No Treatment
- 色
-
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
| 配送業者 | 配送先Thailand | その他の国への配送 |
|---|---|---|
| Standard Shipping - Tracked | $10.00 / 15 | $13.00 / 21 |
|
：国
Standard Shipping - Tracked 、 3以上のアイテムを含む注文で$15.00に割引されます
世界のその他の地域
Standard Shipping - Tracked 、 2以上のアイテムを含む注文で$25.00に割引されます
|
||
| DHL | $35.00 / 10 | $35.00 / 10 |
|
：国
DHL 、 2以上のアイテムを含む注文で$30.00に割引されます
世界のその他の地域
DHL 、 2以上のアイテムを含む注文で$30.00に割引されます
|
||
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ポジティブVery good color. Promptly shipped. Arrived with no documentation.
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ポジティブ
An utterly angelic and charming sparkler, and incredibly clean. It arrived quickly too. Thank you so much
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ポジティブ
Even lovelier in real life. A real beauty. Thanks.
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ポジティブ
Despite the beveled pavilion, the stone shines due to its excellent cut.
監査
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説明が正確
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正確な写真
Comments
The Verified Seller has provided accurate and complete information for this item including weight, dimensions, and treatment.
