Unpolished Opal Formation
Updated September 1, 2026
| Lot number | 0362 |
| Estimate | $150 - $200 |
| Opening bid | $40 |
| Auction | Fall Rock and Fossil Timed Clearance Auction |
| Date | September 19, 2026 at 1:00 PM EDT |
| Auction house | Fossils & Gemstones of Houston |
| Location | Houston, Texas |
Unpolished opal formation from Brazil. 7" x 5" x 3.5". 4 lbs, 14 oz.
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