Ulexite pseudomorph after Tincalconite after Borax (3 generations!) (ex Dr. Wouter van Tichelen Collection)

U.S. Borax Open Pit (Boron pit), U.S. Borax Mine, Kramer Borate deposit, Boron, Kern County California
Miniature, 4.6 x 3.3 x 2.3 cm
Start Time: 05/28/2020 8:45:00 pm (CDT)
End Time: 06/04/2020 6:45:00 pm (CDT)
Auction Closed
Winning Bid: $15
View Closed Auction Set

Item Description

A rarity from the famous Borax Pit (Boron Pit) featuring fibrous white Ulexite that has formed a pseudomorph after Tincalconite after preexisting Borax. This piece started out a single crystal of Borax which altered to Tincalconite over time, and after it was finished, was later pseudomorphed by Ulexite The multi-generational replacement is certainly rare and attractive from this well-known locality, and the piece still retains excellent euhedral form of the original Borax crystal. An excellent overall specimen for any fan of pseudomorphs or minerals from Boron. Valued at $850. From the noted pseudomorph collection of Dr. Wouter van Tichelen of Belgium.

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Bidding History

Bid Amount Bid Time
$15 06/04/2020 4:48:20 pm (CDT)
$10 06/03/2020 2:19:16 pm (CDT)