Jul 05, 2026GIA certified Australian black opal diamond platinum ring size 6.5Est. $5,679-$6,361$2,100Diamond DepotNew York, NY
Jul 07, 2026Antique Edwardian Gold Platinum GIA Black Opal Diamond Halo RingEst. $27,669-$30,989$9,300Diamond DepotNew York, NY
Jul 13, 2026Natural Fire Red Black Opal Gemstones 1.66 Ct. Pear Cabochon Shape 11 x 8.3 Mm.Est. $94-$148$1Treasure of Gems & JewelryLake Charles, LA
Jul 04, 202614k Yellow Gold Arrowhead Ring with Black Opal and DiamondsEst. $12,972-$14,529$3,650Diamond DepotNew York, NY
5 days LeftPlatinum 5.50ct GIA Australian Black Opal Diamond Cocktail RingEst. $16,110-$18,044$4,850Diamond DepotNew York, NY
5 days LeftPlatinum GIA Certified 2.27ctw Black Opal Diamond Cocktail RingEst. $6,652-$7,450$3,000Diamond DepotNew York, NY
Jul 05, 2026Antique 10k Yellow Gold GIA Certified 3.40ct Black Opal RingEst. $8,199-$9,182$3,100Diamond DepotNew York, NY
Jul 08, 20264.32ct Multicolor Black Oval Opal GemstoneEst. $275-$350$185Weatherham Estate TreasuresCobourg, ON
46 mins LeftPlatinum Ladies Ring with 4.02ct Black Opal and 0.72tcw Adjacent DiamondsEst. $10,250-$14,550$50Riverside GalleriesArcadia, CA
Buy NowGIA Certified 2.72ctw Black Opal Platinum Cocktail Ring with Diamonds$4,710Diamond DepotNew York, NY
3 days LeftPlatinum Ladies Ring with 4.02ct Black Opal and 0.72tcw Adjacent DiamondsEst. $10,250-$14,550$50Riverside GalleriesArcadia, CA
Buy NowPlatinum GIA Certified 5.48ct Blue Black Opal Ring with Baguette Diamonds$2,890(18 bids)BidhausNew York, NY
Buy NowPlatinum GIA Certified 2.27ctw Black Opal Diamond Cocktail Ring$3,820(15 bids)BidhausNew York, NY
Jul 02, 2026Platinum GIA Certified 3.65ct Black Opal Diamond Halo RingEst. $11,514-$12,895$5,200Diamond DepotNew York, NY
Buy NowPlatinum GIA Certified 5.48ct Blue Black Opal Ring with Baguette Diamonds$2,890Diamond DepotNew York, NY
6 days LeftPlatinum 2.29ctw Black Boulder Opal Diamond Cluster Cocktail RingEst. $3,403-$3,811$1,525Diamond DepotNew York, NY
5 days LeftPlatinum GIA Certified 1.30ctw Black Opal Diamond Cocktail RingEst. $3,823-$4,282$1,725Diamond DepotNew York, NY
Buy Now14K Yellow Gold Ring with Australian Black Opal Size 6$3,080(12 bids)Mynt AuctionsNew York, NY
Buy NowPlatinum 2.29ctw Black Boulder Opal Diamond Cluster Cocktail Ring$1,950Diamond DepotNew York, NY
Buy NowVintage Platinum 1.66ctw GIA Black Opal & Diamond Cocktail Ring$2,890Diamond DepotNew York, NY
2 hrs LeftVintage Platinum 1.66ctw GIA Black Opal & Diamond Cocktail RingEst. $5,038-$5,643$1,800Diamond DepotNew York, NY