A 14K Gold, Diamond and Black Opal RingEstimate: $400 - $500Current Bid - 2 bids$275Peterborough, NHPeterborough Auctions LLC4.4(28)
18kt. Black Opal RingEstimate: $2,000 - $3,000Current Bid - 1 bid$1,000Asheville, NCBrunk Auctions4.6(528)
Joke Quick Tourmaline, Sapphire, Black Opal, GoEstimate: $5,000 - $7,000Starting Bid$3,000Dallas, TXHeritage Auctions4.2(615)
14K Yellow Gold Cultured Pearl & Opal Ring sz 8.25Estimate: $300 - $600Current Bid - 2 bids$225Rock Hall, MDBayside Auctions4.5(146)
Sterling silver faceted black fire opal ring sz 8Estimate: $50 - $150Starting Bid$5Canton, OHACER, LLC
18 kt gold opal-diamond-ringEstimate: €850 - €4,700Starting Bid€850Mutterstadt, RPHenry's Auktionshaus AG4.3(212)
Ends in 9d 19hUnusual black opal and 70pts diamond 3 stone ring in 18ct yellow gold and platinumEstimate: £800 - £850Starting Bid£420 Gloucestershire Banks Jewellery Auctions4.4(16)
Rada 14K Yellow Gold Shell Cameo, Opal & Black Enamel RingEstimate: $1,500 - $2,200Starting Bid$225Owens Cross Roads, AL1111 Jewelry Store, LLC4.3(8)
Natural Fire Red Black Opal 1.39 Ct Oval Cabochon 9.8x8 mm Treated Ethiopia Loose Gemstone GiftEstimate: $80 - $127Starting Bid$1Lake Charles, LATreasure of Gems & Jewelry4.4(275)
14K BRIGHT-POLISHED YELLOW GOLD, BLACK OPAL DOUBLET, AND DIAMOND CONTEMPORARY DESIGN RING - RingEstimate: $400 - $600Starting Bid$200Chevy Chase, MDSloans & Kenyon4.4(108)
Natural Fire Red Black Opal 1.66 Ct Pear Cabochon 11x8.3 mm Treated Ethiopia Loose Gemstone GiftEstimate: $94 - $148Starting Bid$1Lake Charles, LATreasure of Gems & Jewelry4.4(275)
Ends in 9d 19hBLACK OPAL AND DIAMOND HALO RING IN 18CT WHITE GOLDEstimate: £1,100 - £1,150Current Bid - 1 bid£560 Gloucestershire Banks Jewellery Auctions4.4(16)
Brutalist Diamond Opal Black RingEstimate: $500 - $800Starting Bid$60Redmond, ORAttic Estates & Appraisals
3.12 Ct Natural Black Flashing Fire Opal Pear CabEstimate: $100 - $200Starting Bid$1Bangkok, THGems Auction4.7(500)
5.09 Ct Natural Black Flashing Fire Opal Pear cabEstimate: $100 - $200Starting Bid$1Bangkok, THGems Auction4.7(500)
3.62 Ct Natural Black Flashing Fire Opal Pear CabEstimate: $100 - $200Starting Bid$1Bangkok, THGems Auction4.7(500)
3.16 Ct Natural Black Flashing Fire Opal Pear CabEstimate: $100 - $200Starting Bid$1Bangkok, THGems Auction4.7(500)
2.32 Ct Natural Black Flashing Fire Opal Pear CutEstimate: $100 - $200Starting Bid$1Bangkok, THGems Auction4.7(500)
2.57 Ct Natural Black Flashing Fire Opal Pear CutEstimate: $100 - $200Starting Bid$1Bangkok, THGems Auction4.7(500)
2.60 Ct Natural Black Flashing Fire Opal Oval CabEstimate: $100 - $200Starting Bid$1Bangkok, THGems Auction4.7(500)
3pc 14.9ctw Black and White Opal Loose GemstonesEstimate: $90 - $200Starting Bid$20Hollywood, FLLion and Unicorn4.7(2.6k)