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$133.00
预留未满足
当前出价
17
出价
19/09/2024 05:29 pm
17
2150
5
Rarest 4.05 Carat Top Quality Loupe Clean Bastnasite Gemstone
17
2150
5
- 存货单位
- 尺寸(毫米)
- 11.580 x 6.110 x 4.500mm
- 重量 (cts)
- 4.050
- Treatment
- No Treatment
- 类型
- Faceted
- 颜色
-
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).
- 存货单位
- 尺寸(毫米)
- 11.580 x 6.110 x 4.500 mm
- 重量 (cts)
- 4.050
- Treatment
- No Treatment
- 类型
- Faceted
- 颜色
-
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).
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Standard Shipping - Tracked 对包含 2 或更多商品的订单折扣为 $18.00
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FedEx | $50.00 / :几天天 | $50.00 / :几天天 |
:国家
FedEx 对包含 2 或更多商品的订单折扣为 $50.00
世界其他地区
FedEx 对包含 2 或更多商品的订单折扣为 $50.00
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积极的
Very nice! Thanks
-
积极的
I'm so fascinated by this gem! Beautiful!
-
积极的
Beautiful gem
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积极的
Stunning gem!
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积极的
I received the tourmaline I ordered. It's beautiful.
投标历史 (17)
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送货细节
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$15.00 :通过 Standard Shipping - Tracked 计算天数
发货自:
Thailand
付款方式
概述
列表类型 :
Standard
产品编号 :
1412448
预计建议零售价 :
$3,000.00
起拍价 : $1
开始 : 5th September 2024 05:29 pm PDT
结束 : 19th September 2024 05:29 pm PDT
* 所有价格均以:货币为单位