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3.80 Ct Incredible Natural Grandidierite Gemstone SKU A16
- SKU
- 寸法(mm)
- 12 x 9.7 x 4.48mm
- 重さ (CT)
- 3.8
- 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
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|---|---|---|
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- SKU
- 寸法(mm)
- 12 x 9.7 x 4.48 mm
- 重さ (CT)
- 3.8
- 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
| プロバイダー | 行き先 | 料金 |
|---|---|---|
| Standard Shipping - Tracked デフォルト |
その他の地域
21
|
最初のアイテム
追加アイテムごとに
送料上限
|
| DHL |
その他の地域
10
|
最初のアイテム
追加アイテムごとに
送料上限
|
| Standard Shipping - Tracked デフォルト |
タイ
15
|
最初のアイテム
追加アイテムごとに
送料上限
|
| DHL |
タイ
10
|
最初のアイテム
追加アイテムごとに
送料上限
|
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ポジティブExcellent cut, nice color. Very happy with my purchase !
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ポジティブ
Thank you! Got this fast.
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ポジティブ
Thank you! Got this fast.
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ポジティブ
Stunning was the correct description for this delighful gemstone, Lovely hue, well cut and the fluorescence is amazing! Beautiful Violet colors under UV. I have 5 other Scapolite and this one truly becomes a vivid violet. Just gorgeous!
監査
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説明が正確
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正確な写真
Comments
The Verified Seller responsible for this item has diligently provided us with accurate and comprehensive information, encompassing crucial details such as weight, dimensions, and treatment. It is important to reiterate our commitment to upholding the highest standards of integrity and transparency in the gemstone industry. As part of our policy, we strictly permit the sale of exclusively natural gemstones that have been sourced directly from the Earth. However, in the event that a gemstone has undergone any form of treatment, it is mandatory for the seller to provide full disclosure regarding the treatment process. Furthermore, we would like to emphasize that man-made gemstones, including simulants and imitations, are strictly prohibited on our platform. We prioritize the promotion of authentic, natural gemstones to ensure a genuine and trustworthy marketplace for our valued customers. Should you have any further inquiries or require additional assistance, please do not hesitate to reach out. We are here to assist you and provide a seamless experience on Gem Rock Auctions.
