6.30 Carat ---- Natural Cobalt Blue Spinel ---- Cushion Cut
Updated August 15, 2026
This auction ended on August 23, 2026.
See upcoming auctions from California Gemstones.
| Lot number | 0119 |
| Estimate | $17,000 - $19,000 |
| Opening bid | $30 |
| Auction | Sunday Aug 23 4pm |
| Date | August 23, 2026 at 7:00 PM EDT |
| Auction house | California Gemstones |
| Location | Oceanside, California |
An investment-grade gemstone from Sri Lanka. Featuring a classic cushion cut, it exhibits a brilliant, lively blend of cobalt blue hues. Renowned for its natural, unheated state, it is highly sought
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