Rare Rough Tourmaline Mineral Specimen
Updated August 27, 2026
| Lot number | 0047 |
| Estimate | $6,720 - $8,400 |
| Opening bid | $560 |
| Auction | Precious Gemstones & Luxury Fine Jewelry |
| Date | September 12, 2026 at 1:00 PM EDT |
| Auction house | Ryan & Co Jewelers |
| Location | Rockville, Maryland |
A substantial 21.15ct unheated tourmaline rough crystal showing prominent natural striations and excellent gem potential. Substantial 21-carat unheated rough showing such excellent gem potential is
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