すべての写真を見る (13)
$4,000.00 USD
推定希望小売価格 $8,000.00
閉まっている
01/10/2021 11:33 pm
1168
7
Rarest 13.80 Carat Top Quality Loupe Clean Bastnasite Gemstone
1168
7
- SKU
- 寸法(mm)
- 12.150 x 11.500 x 8.900mm
- 重さ (CT)
- 13.800
- タイプ
- Faceted
- 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).
- SKU
- 寸法(mm)
- 12.150 x 11.500 x 8.900 mm
- 重さ (CT)
- 13.800
- タイプ
- Faceted
- 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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世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $30.00 に割引されます
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ポジティブ
Nice stone.Thank you
監査
Gemstone Sheriffプログラムを使用すると、当社のメンバーはあらゆる製品の監査をリクエストできます。この監査は、商品の説明と写真の正確さを評価する独立した:資格認定者によって完了されます。
発送詳細
配送:
$13.00 Standard Shipping - Tracked 経由の日数をカウント
発送元:
Thailand
支払いオプション
概要
リストタイプ :
Standard
製品番号 :
1305388
始まります : 27th September 2021 04:50 am PDT
* すべての価格は:通貨で表示されます