10.20 Carat ---- Natural Tanzanite -- Modified Cushion Cut --- European Gem Lab Certified
Updated August 6, 2026
| Lot number | 8933 |
| Estimate | $14,000 - $16,000 |
| Opening bid | $100 |
| Auction | August 7 Friday 7pm Rubies & Sapphires |
| Date | August 7, 2026 at 10:00 PM EDT |
| Auction house | California Gemstones |
| Location | Oceanside, California |
A 10.20-carat natural tanzanite in a modified cushion cut is an exceptionally large, rare collector's gemstone. It typically features a deep, saturated bluish-violet color. Tanzanites of this carat
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