ANTIQUE PLATINUM 0.45CT DIAMOND AND ONYX RING
Updated September 5, 2026
This auction ended on September 25, 2026.
See upcoming auctions from Robinhood Auctions or current jewelry & watches auctions.
| Lot number | 0429 |
| Estimate | $1,200 - $4,800 |
| Opening bid | $1,200 |
| Category | Jewelry & Watches |
| Auction | Designer Jewelry & Fine Watches |
| Date | September 25, 2026 at 1:00 PM EDT |
| Auction house | Robinhood Auctions |
| Location | Las Vegas, Nevada |
This striking antique platinum ring features three bezel-set old European-cut diamonds, totaling approximately 0.45 carats, each framed within polished black onyx halos. Delicate green gemstone
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