Jul 05, 2026Natural Play Of Color Rainbow Fire Red Black Opal Gemstones 1.38 Ct. Oval Cabochon Shape 11.8 x 6.3Est. $124-$196$1Treasure of Gems & JewelryLake Charles, LA
6 days LeftPlatinum 2.29ctw Black Boulder Opal Diamond Cluster Cocktail RingEst. $3,403-$3,811$1,525Diamond DepotNew York, NY
18 hrs LeftGIA Certified 2.72ctw Black Opal Platinum Cocktail Ring with DiamondsEst. $4,836-$6,286$3,700BidhausNew York, NY
Jul 06, 20261.40 Ct Natural Black Flashing Fire Opal Oval CabEst. $75-$150$1(1 bid)Gems AuctionBangkok, TH
3 days LeftGIA Black Opal 18k Yellow Gold Cocktail Ring with Diamond SidesEst. $5,834-$6,534$1,725Diamond DepotNew York, NY
Jul 13, 2026Natural Fire Red Black Opal Gemstones 1.60 Ct. Oval Cabochon Shape 10.9 x 8.4 Mm.Est. $85-$133$1Treasure of Gems & JewelryLake Charles, LA
Ends in 7d 10hBeautiful 7.45 CT Natural Black Opal Ring With Natural Black Diamond & 18k GoldEst. —£550William GeorgeBedfordshire
Jul 12, 2026VINTAGE 10K GOLD RING, NATURAL OPAL AND BLACK PORCELAIN INLAY ( SIZE: 6 ) 11.3GEst. $2,040-$2,280$1,675Modern JewelryValley Village, CA
4 days LeftBAGLEY & HOTCHKISS 18K YELLOW GOLD BLACK OPAL INLAY & DIAMOND RING 12.5GEst. $3,902-$4,361$3,200Modern JewelryValley Village, CA
Jul 07, 2026Antique Edwardian Gold Platinum GIA Black Opal Diamond Halo RingEst. $27,669-$30,989$9,300Diamond DepotNew York, NY
5 days LeftPlatinum GIA Certified 1.30ctw Black Opal Diamond Cocktail RingEst. $3,823-$4,282$1,725Diamond DepotNew York, NY
Jul 03, 2026Opal and Black Onyx Cocktail Ring in 14k Yellow Gold Twisted FrameEst. $2,939-$3,292$860Diamond DepotNew York, NY