GIA certified 7.17ct natural cabochon opal diamonds cocktail ring 14kt**Chairish Auctions4.5(10.4k)$1,600
GIA Certified 2.72ctw Black Opal Platinum Cocktail Ring with DiamondsBidhaus4.3(859)$2,4502 days Left
Platinum GIA Certified 4.04ctw Black Opal Diamond Ballerina RingDiamond Depot4.2(13)$2,550May 13, 2026
Black Opal 8.38ct Diamond Platinum Cocktail Ring 9.6 GramsDover Jewelry4.4(17)$150(2 bids)May 11, 2026
Platinum 1.54ct Black Opal and 0.50ctw Diamond Cocktail RingGallery 634.6(272)$60(3 bids)May 20, 2026
