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Reserve Not Met
Current Bid
17
Bids
11/12/2025 04:29 pm

Rarest 4.05 Carat Top Quality Loupe Clean Bastnasite Gemstone

17 bids
2874 views
8 watching
Details
SKU
Dimensions (mm)
11.58 x 6.11 x 4.5mm
Weight (cts)
4.05
Treatment
No Treatment
Type
Faceted
Colours
Description
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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Bids History (17)

Reserve not met

jeff4532
jeff4532
1 year ago
drakulj829
drakulj829
1 year ago
Purchased from this seller previously
orian
orian
3 years ago
Purchased from this seller previously
orian
orian
3 years ago
Purchased from this seller previously
papa2kids
papa2kids
3 years ago
vinsonwade
vinsonwade
3 years ago
papa2kids
papa2kids
4 years ago
papa2kids
papa2kids
4 years ago
papa2kids
papa2kids
4 years ago
papa2kids
papa2kids
4 years ago
papa2kids
papa2kids
4 years ago
papa2kids
papa2kids
4 years ago
papa2kids
papa2kids
4 years ago
papa2kids
papa2kids
4 years ago
deliase
deliase
4 years ago
Purchased from this seller previously
deliase
deliase
4 years ago
Purchased from this seller previously
david01
david01
4 years ago
Purchased from this seller previously

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Shipping Details

Costs:
Transit:
21 days via Standard Shipping - Tracked
Ships from:
Thailand

Payment Options

  • paypal

Overview

Listing Type : Standard
Product ID : 1412448
Estimated RRP :
Starting Bid :
Starts : 27th November 2025 04:29 pm PST
Ends : 11th December 2025 04:29 pm PST
* All prices are in USD

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