Colemanite

Thompson Mine, Boraxo Mine, Ryan, Furnace Creek Mining District, Inyo Co., California, USA
Ex. Demetrius Pohl
Small Cabinet, 8.2 x 6.3 x 4.1 cm
Start Time: 08/01/2024 8:00:00 pm (CDT)
End Time: 08/08/2024 6:45:00 pm (CDT)
Auction Closed
Winning Bid: $35
View Closed Auction Set

Item Description

A wonderful Colemanite specimen from Death Valley National Park. The Thompson Mine (Boraxo Pit #1) closed in 1977, but it produced some of the finest quality Colemanite crystals from any locality in California. The best examples from this locality are the unusually blocky / thick crystals with well-defined, smooth crystal faces. This piece is a wonderful example of this material featuring a group of very sharp, well-formed, soft grey colored crystals measuring up to 4.7 cm across with slightly striated, lustrous faces and decent internal translucency when backlit. The piece fluoresces a pale yellow hue under SW UV light. It's crystallized on all sides, and only has minor roughness in areas. I wouldn't call it a complete "floater", but it's close. A very good quality specimens for the species.
From the worldwide mineral collection of geologist, Demetrius Pohl (#963).

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Bidding History

Bid Amount Bid Time
$35 08/08/2024 6:34:54 pm (CDT)
$30 08/08/2024 5:23:25 pm (CDT)
$25 * 08/08/2024 5:23:14 pm (CDT)
$25 * 08/08/2024 5:23:14 pm (CDT)
$20 08/07/2024 5:17:11 pm (CDT)
$15 08/07/2024 5:17:11 pm (CDT)
$10 08/03/2024 2:23:41 am (CDT)
* Proxy Bid Battle: In the event of two customers inputting matching proxy bids, the leading bid goes to the earliest of the two proxy bids. Tie winners are shown in bold.