10.20 Carat ---- Natural Tanzanite -- Modified Cushion Cut
Updated August 14, 2026
This auction ended on August 22, 2026.
See upcoming auctions from California Gemstones.
| Lot number | 8933 |
| Estimate | $13,000 - $15,000 |
| Opening bid | $30 |
| Auction | Saturday Aug 22 4pm |
| Date | August 22, 2026 at 7:00 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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