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8.35CT BOLIVIAN AMETRINE BEST QUALITY STONES IGCAMCB29
- 存貨單位
- 尺寸(毫米)
- 13.000 x 10.000 x 7.000mm
- 重量 (cts)
- 8.350
- Treatment
- No Treatment
- 類型
- Faceted
- 顏色
-
Grandidierite Description
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. Many rare gem collectors would love to add grandidierite to their collections, but it has been almost impossible to find. The recent discovery of some gem quality material in Madagascar has now made a few high quality stones available. 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. 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. It forms in the orthorhombic crystal system. Grandidierite is typically bluish green in color and derives its distinctive color from traces of iron. The hardness of the gem makes attractive fine jewelry, but cutters must be careful when shaping the stone to avoid fractures. Jewel experts typically cannot set a specific price for the gem, but they generally estimate about $20,000 a carat. INFORMATION Color: Bluish green Twinning: none Cleavage : Perfect Fracture: Brittle scale hardness: 7.5 Luster: Vitreous, Pearly Streak: White Diaphaneity: Transparent, Translucent Density: 2.976 Optical properties: Biaxial (-) Refractive index: 1.583 - 1.639 Pleochroism: Visible 2V angleMeasured: 24° to 32°, Calculated: 32° Dispersion: strong r < v>
TREATMENT : UNHEATED
(IGC WE OFFER BEST SERVICE OF SHIPPING IN NO RESERVE AUCTION NO COMBINE SHIPPING OFFER THE COST IS 6$ FOR PER
ITEM IN NO RESERVE AUCTION .
BUY NOW AND RESERVE AUCTION YOU CAN COMBINE UPTO 8 ITEMS IN ONE SHIPPING COST
(BUYER MUST PAY BETWENN 2 DAYS OF AUCTION END OTHERWISE ORDER WILL BE CANCEL )
AIRMAIL RAGISTERED SHIPPING 5$ 7-21 DAYS
DHL EXPRESS SHIPPING 25$ 3-4 DAYS CHECK OUT OUR MORE ITEMS IN OUT STORE THERE YOU CAN GET MANY BEAUTIFUL GEMSTONES , BEADS AND JEWELRY ALSO MINERALS SPECIMENS
IF YOU HAVE ANY PROBLEM WITH RECEIVE ITEM PLEASE DO NOT PUT NEGATIVE FEEDBACK WE ARE WELCOME TO SOLVE ALL YOUR
PROBLEMS REFUND , RE-POLISH , RETURN , EXCHANGE ALL ACCEPTED , WE WILL NEVER LET YOU UPSET FROM US IN SHA ALLAH
WE ACCEPT PAYPAL ONLY PAYPAL
- 存貨單位
- 尺寸(毫米)
- 13.000 x 10.000 x 7.000 mm
- 重量 (cts)
- 8.350
- Treatment
- No Treatment
- 類型
- Faceted
- 顏色
-
Grandidierite Description
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. Many rare gem collectors would love to add grandidierite to their collections, but it has been almost impossible to find. The recent discovery of some gem quality material in Madagascar has now made a few high quality stones available. 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. 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. It forms in the orthorhombic crystal system. Grandidierite is typically bluish green in color and derives its distinctive color from traces of iron. The hardness of the gem makes attractive fine jewelry, but cutters must be careful when shaping the stone to avoid fractures. Jewel experts typically cannot set a specific price for the gem, but they generally estimate about $20,000 a carat. INFORMATION Color: Bluish green Twinning: none Cleavage : Perfect Fracture: Brittle scale hardness: 7.5 Luster: Vitreous, Pearly Streak: White Diaphaneity: Transparent, Translucent Density: 2.976 Optical properties: Biaxial (-) Refractive index: 1.583 - 1.639 Pleochroism: Visible 2V angleMeasured: 24° to 32°, Calculated: 32° Dispersion: strong r < v>
TREATMENT : UNHEATED
(IGC WE OFFER BEST SERVICE OF SHIPPING IN NO RESERVE AUCTION NO COMBINE SHIPPING OFFER THE COST IS 6$ FOR PER
ITEM IN NO RESERVE AUCTION .
BUY NOW AND RESERVE AUCTION YOU CAN COMBINE UPTO 8 ITEMS IN ONE SHIPPING COST
(BUYER MUST PAY BETWENN 2 DAYS OF AUCTION END OTHERWISE ORDER WILL BE CANCEL )
AIRMAIL RAGISTERED SHIPPING 5$ 7-21 DAYS
DHL EXPRESS SHIPPING 25$ 3-4 DAYS CHECK OUT OUR MORE ITEMS IN OUT STORE THERE YOU CAN GET MANY BEAUTIFUL GEMSTONES , BEADS AND JEWELRY ALSO MINERALS SPECIMENS
IF YOU HAVE ANY PROBLEM WITH RECEIVE ITEM PLEASE DO NOT PUT NEGATIVE FEEDBACK WE ARE WELCOME TO SOLVE ALL YOUR
PROBLEMS REFUND , RE-POLISH , RETURN , EXCHANGE ALL ACCEPTED , WE WILL NEVER LET YOU UPSET FROM US IN SHA ALLAH
WE ACCEPT PAYPAL ONLY PAYPAL
運輸商 | 運送至:國家 | 運送到世界其他地區 |
---|---|---|
FedEx | $50.00 / :幾天天 | $50.00 / :幾天天 |
:國家
FedEx 對包含 2 或更多商品的訂單折扣為 $50.00
世界其他地區
FedEx 對包含 2 或更多商品的訂單折扣為 $55.00
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DHL | $50.00 / :幾天天 | $50.00 / :幾天天 |
:國家
DHL 對包含 2 或更多商品的訂單折扣為 $50.00
世界其他地區
DHL 對包含 2 或更多商品的訂單折扣為 $55.00
|
||
Express Shipping | $11.00 / :幾天天 | $11.00 / :幾天天 |
:國家
Express Shipping 對包含 3 或更多商品的訂單折扣為 $28.00
世界其他地區
Express Shipping 對包含 3 或更多商品的訂單折扣為 $28.00
|
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積極的
Excited to see in person. Thank you!
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積極的
Quick shipment, good quality
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積極的
Quick shipment, good quality
-
積極的
Very beautiful Gemstone, everything is 100% ok
-
積極的
Very beautiful Gemstone, everything is 100% ok
為什麼用戶出價高於自己?
出價時,這是用戶願意為產品出價的最高金額。然後,我們的系統將代表該用戶自動出價,逐步提高出價以保持其作為最高出價者的地位,直至達到指定的最高價。
當出現“自動出價”圖標時,表示我們的系統正在根據用戶的最高出價主動為用戶出價。這可能看起來好像用戶出價高於自己,但這只是系統更新出價以反映用戶最高限額的結果。