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Thaumasite (GEMMY doubly-terminated crystal)
- N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa
- Thumbnail, 0.8 x 0.3 x 0.2 cm
- Start Time: 06/17/2021 8:00:00 pm (CDT)
- End Time: 06/24/2021 7:00:00 pm (CDT)
- Auction Closed
- Winning Bid: $150
Item Description
A classic specimen of GEM QUALITY Thaumasite from the famous N'Chwaning Mines. This rare sulfate has a strange chemistry as it has carbonate, sulfate and hexahydroxysilicate anions in the same species. This thumbnail is a single, sharp, lustrous, doubly-terminated very pale yellow (nearly colorless) Thaumasite crystal free of matrix. One end of the crystal is WATER-CLEAR, which is not commonly seen in Thaumasites from this area. Originally, these pieces came out labeled as Ettringites, but it has now been shown they are the much rarer member of that series.
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Bidding History
| Bid Amount | Bid Time |
|---|---|
| $150 | 06/24/2021 6:38:39 pm (CDT) |
| $140 | 06/24/2021 6:38:39 pm (CDT) |
| $130 | 06/24/2021 6:38:33 pm (CDT) |
| $120 | 06/24/2021 6:38:33 pm (CDT) |
| $110 | 06/24/2021 6:03:28 pm (CDT) |
| $100 | 06/24/2021 6:03:28 pm (CDT) |
| $90 | 06/24/2021 6:01:51 pm (CDT) |
| $80 | 06/24/2021 6:01:51 pm (CDT) |
| $70 | 06/24/2021 6:01:46 pm (CDT) |
| $60 | 06/24/2021 6:01:45 pm (CDT) |
| $50 | 06/21/2021 8:25:16 pm (CDT) |
| $45 | 06/21/2021 8:25:16 pm (CDT) |
| $40 | 06/21/2021 8:25:10 pm (CDT) |
| $35 | 06/21/2021 8:25:10 pm (CDT) |
| $30 | 06/21/2021 8:25:03 pm (CDT) |
| $25 | 06/21/2021 8:25:03 pm (CDT) |
| $20 | 06/21/2021 6:37:33 pm (CDT) |
| $15 | 06/21/2021 4:39:04 am (CDT) |
| $10 | 06/18/2021 5:07:33 pm (CDT) |