Massive Coco Pyrite Formation - MONUMENT
Updated September 1, 2026
| Lot number | 0572 |
| Estimate | $3,500 - $4,000 |
| Opening bid | $1,500 |
| 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 |
Massive coco pyrite formation from the Huanzala Mine in Peru. Exceptionally large crystals. 9” x 10" x 13”. 58 lbs, 7 oz.
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