7 Optical Calcite Iceland Spar Rhomboid Formations
Updated September 1, 2026
| Lot number | 0287 |
| Estimate | $80 - $100 |
| Opening bid | $1 |
| 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 |
Group of 7 optical calcite/Iceland spar rhomboid formations. 1.34 pounds.
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