Iridescent Carbon Silicon Crystal Specimens
Updated August 10, 2026
| Lot number | 714275 |
| Estimate | $8 - $24 |
| Opening bid | $8 |
| Category | Pottery, China & Glass |
| Auction | CURIO CABINET ANTIQUES CARVINGS GEMS |
| Date | August 12, 2026 at 6:00 PM EDT |
| Auction house | Col. Christie Hatman Auctioneers |
| Location | Thayer, Missouri |
Two pieces of rainbow-iridescent black crystalline mineral (carborundum/silicon carbide) with sparkling rainbow flashes across a druzy crystal surface. Shown with a quarter for scale, each roughly 3
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