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World Rarest Gem 5.85Carat Top Quality Super Red Bastnasite
- 存貨單位
- 尺寸(毫米)
- 11.720 x 7.020 x 5.700mm
- 重量 (cts)
- 5.850
- Treatment
- No Treatment
- Shape
- Cushion
- 類型
- Faceted
- Clarity
- VS
- 顏色
-
Bastnäsite-(Ce), which has the chemical formula (Ce,RE)(CO3)(F,OH), and parisite-(Ce), or Ca(Ce,RE) 2(CO3) 3(F,OH)2, are cerium-dominant rare-earth (RE) carbonates. Although they very rarely form as crystals large and clean enough for faceting, one locality in Pakistan (Zagi or Zegi Mountain) has produced bastnäsite-(Ce) that has been faceted into stones up to 20 ct (Johnson, 1999; Obodda and Leavens, 2004). Gem-quality parisite-(Ce) has been reported very rarely, usually associated with Colombian emeralds such as those from Muzo (Henn et al., 1992). In fact, the mineral is named in honor of J. I. Paris, one of the first managers of the Muzo mine (Palache et al., 1963). This note reports on bastnäsite- (Ce) and parisite-(Ce) from Malawi’s Mt. Malosa, where these minerals occur as well-formed crystals that locally may contain clear, gem-quality portions (e.g., figure 1). One of the authors (AG) visited the deposit in 2002 for research purposes, and has documented the geology and mineralogy of the area in other publications (e.g., Guastoni et al., 2007, 2009).
- 存貨單位
- 尺寸(毫米)
- 11.720 x 7.020 x 5.700 mm
- 重量 (cts)
- 5.850
- Treatment
- No Treatment
- Shape
- Cushion
- 類型
- Faceted
- Clarity
- VS
- 顏色
-
Bastnäsite-(Ce), which has the chemical formula (Ce,RE)(CO3)(F,OH), and parisite-(Ce), or Ca(Ce,RE) 2(CO3) 3(F,OH)2, are cerium-dominant rare-earth (RE) carbonates. Although they very rarely form as crystals large and clean enough for faceting, one locality in Pakistan (Zagi or Zegi Mountain) has produced bastnäsite-(Ce) that has been faceted into stones up to 20 ct (Johnson, 1999; Obodda and Leavens, 2004). Gem-quality parisite-(Ce) has been reported very rarely, usually associated with Colombian emeralds such as those from Muzo (Henn et al., 1992). In fact, the mineral is named in honor of J. I. Paris, one of the first managers of the Muzo mine (Palache et al., 1963). This note reports on bastnäsite- (Ce) and parisite-(Ce) from Malawi’s Mt. Malosa, where these minerals occur as well-formed crystals that locally may contain clear, gem-quality portions (e.g., figure 1). One of the authors (AG) visited the deposit in 2002 for research purposes, and has documented the geology and mineralogy of the area in other publications (e.g., Guastoni et al., 2007, 2009).
運輸商 | 運送至:國家 | 運送到世界其他地區 |
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Standard Shipping - Tracked | $10.00 / :幾天天 | $15.00 / :幾天天 |
:國家
Standard Shipping - Tracked 對包含 2 或更多商品的訂單折扣為 $15.00
世界其他地區
Standard Shipping - Tracked 對包含 2 或更多商品的訂單折扣為 $20.00
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FedEx | $35.00 / :幾天天 | $35.00 / :幾天天 |
世界其他地區
FedEx 對包含 2 或更多商品的訂單折扣為 $35.00
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Express Shipping | $35.00 / :幾天天 | $60.00 / :幾天天 |
世界其他地區
Express Shipping 對包含 2 或更多商品的訂單折扣為 $60.00
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積極的
Stone is beautiful! Great color and cut!
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消極的
I got a no-color stone. It did not have any color. Very disappointed. Very sad.
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。
審計
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描述準確
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圖片準確
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.