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Calcite & Colemanite on Ulexite (Kay Robertson Coll.)
- U.S. Borax open pit (Boron pit), Boron, Kern Co., California
- Small Cabinet, 5.5 x 4.6 x 3.9 cm
- Start Time: 03/05/2020 6:30:00 pm (CST)
- End Time: 03/12/2020 6:30:00 pm (CDT)
- Auction Closed
- Winning Bid: $82
Item Description
Acicular ulexite is the most desirable collector variety of this most unusual Borate species. The fibrous varietal, so-called TV rock, has striking fiber optic qualities. An impressive rich mound of tiny snow-white fibers is attractively accented with a showy contrasting band of brown-sugar calcite crystals and glassy colemanite prisms. Ex Kay Robertson Collection # 3451 and acquired from Brad van Scriver in 1964. Kay is a prominent California collector, who specialized in European classics (see the article in the March-April, 2007 Mineralogical Record and the 50+ page article in the German Magazine "Mineralien-Welt" November-December 2017). A classic and excellent Boron Pit combination.
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Bidding History
| Bid Amount | Bid Time |
|---|---|
| $82 | 03/12/2020 6:23:37 pm (CDT) |
| $72 | 03/12/2020 6:23:35 pm (CDT) |
| $62 | 03/12/2020 6:00:03 pm (CDT) |
| $52 | 03/12/2020 6:00:00 pm (CDT) |
| $38 | 03/09/2020 11:47:07 pm (CDT) |
| $33 | 03/08/2020 9:12:27 am (CDT) |
| $28 | 03/08/2020 9:12:14 am (CDT) |
| $26 | 03/08/2020 9:12:13 am (CDT) |
| $21 | 03/08/2020 1:52:32 am (CST) |
| $16 | 03/08/2020 1:52:32 am (CST) |
| $10 | 03/07/2020 1:01:42 pm (CST) |