SaveStarts May 12Unusual black opal and 70pts diamond 3 stone ring in 18ct yellow gold and platinumBanks Jewellery Auctions4.3(9)Est. £800-£850£500
Save2 days LeftPlatinum 1.67ct Black Opal Diamond Cocktail RingDiamond Depot4.2(14)Est. $2,696-$3,033$870
Save4 days LeftOpal and Black Onyx Cocktail Ring in 14k Yellow Gold Twisted FrameDiamond Depot4.2(14)Est. $2,846-$3,201$810
SaveMay 31, 2026VTG MODERNIST BRUTALIST 18K YELLOW GOLD AUSTRALIAN BLACK OPAL DIAMOND RING 28.7GModern Jewelry4.5(205)Est. $7,650-$8,550$6,300
SaveBuy Now14k Yellow Gold Arrowhead Ring with Black Opal and DiamondsMynt Auctions4.4(870)$7,440(18 bids)
Save5 days LeftGIA Certified 2.69ctw Black Opal Diamond Halo Platinum RingDiamond Depot4.2(14)Est. $4,879-$5,489$1,725
SaveBuy NowVintage GIA Certified 6.72ctw Black Opal Diamond Halo Platinum RingDiamond Depot4.2(14)$7,520
SaveBuy NowGIA Certified 2.72ctw Black Opal Platinum Cocktail Ring with DiamondsDiamond Depot4.2(14)$4,710
SaveBuy NowPlatinum GIA Certified 2.33ct Black Opal Baguette Diamond Cocktail RingDiamond Depot4.2(14)$4,730
Save4 days Left14K Yellow Gold Mosaic Opal Black Onyx Wide Band Ring Size 11Diamond Depot4.2(14)Est. $2,054-$2,311$670
Save6 days LeftPlatinum GIA Certified 1.30ctw Black Opal Diamond Cocktail RingDiamond Depot4.2(14)Est. $3,702-$4,164$1,075
SaveMay 19, 2026Platinum GIA Certified 2.93ct Black Opal Diamond Halo RingDiamond Depot4.2(14)Est. $5,906-$6,644$1,750
SaveBuy NowPlatinum GIA Certified 4.04ctw Black Opal Diamond Ballerina RingDiamond Depot4.2(14)$3,820
SaveMay 31, 2026BAGLEY & HOTCHKISS 18K YELLOW GOLD BLACK OPAL INLAY & DIAMOND RING 12.5GModern Jewelry4.5(205)Est. $3,901-$4,360$3,200
SaveMay 24, 2026VINTAGE 10K GOLD RING, NATURAL OPAL AND BLACK PORCELAIN INLAY ( SIZE: 6 ) 11.3GModern Jewelry4.5(205)Est. $2,039-$2,279$1,675