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$133.00
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当前出价
17
出价
26/12/2024 04:29 pm

Rarest 4.05 Carat Top Quality Loupe Clean Bastnasite Gemstone

17
2309
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).

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argemsjewelry
argemsjewelry
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  • blessingtothem
    blessingtothem
    积极的

    Such a pretty stone, beautifully faceted. Thank you

  • beautifulgemslover
    beautifulgemslover
    消极的

    Argemsjewelry shipped item to wrong address and zip code, I did not receive item, then have to go through a long refund process. I would save myself time and not buy from this seller again.

  • jtg56
    jtg56
    积极的

    Paid and shipped - no feedback left after 100 days

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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 : 12th December 2024 04:29 pm PST
结束 : 26th December 2024 04:29 pm PST
* 所有价格均以:货币为单位