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2 days LeftAN 18K YELLOW GOLD, AGATE, AND PEARL CAMEO BROOCH, FRENCH,Est. $600-$800$300Houston, TXSimpson Galleries, LLC4.5(255)
12 hrs LeftMARTIN MAYER MAINZ agate-broochEst. €250-€1,000€250Mutterstadt, Rheinland-PfalzHenry's Auktionshaus AG4.3(211)
4 days Left9ct rose gold Victorian Scottish agate dirk sword pin brooch set with bloodstone, jasper, and glassEst. $200-$400$50(1 bid)Indianapolis, INRipley Auctions4.4(210)
Oct 3, 202619thC Victorian Agate Brooch in 14k GoldEst. $300-$500$150Beverly, MAKaminski Auctions4.3(652)
4 days LeftAntique Victorian Scottish agate pebble swivel brooch 2 1/2"H x 2 1/8"WEst. $300-$500$100(1 bid)Indianapolis, INRipley Auctions4.4(210)
2 days Left9KT GOLD AGATE-TURQUOISE BROOCHEst. CA$300-CA$500CA$150Ottawa, OntarioPridham's Auctions & Appraisals4.7(226)
3 days LeftVictorian "bull's-eye" banded agate 14K broochEst. $500-$600$150Fresh Meadows, NYAffinity Antique Auction4.4(281)
4 days LeftVictorian Scottish agate dirk kilt pin brooch with engraved silver, agate, jasper, and smoky quartz.Est. $300-$600$100(1 bid)Indianapolis, INRipley Auctions4.4(210)
Oct 8, 202618K Gold Agate Cameo BroochEst. £1,200-£2,400£10(1 bid)South Croydon, CroydonHans Auction4.5(132)
Oct 8, 2026Vintage Irish Sterling Silver Moss Agate Shamrock BroochEst. $30-$200$2(1 bid)Mantua, OHRetro Roadshow Auctions4.6(244)
Oct 14, 2026A 9CT GOLD TURQUOISE AND AGATE BROOCHEst. £100-£200£50Skipton, North YorkshireHutchinson Scott Auctioneers4.3(53)
3 days Left18K Yellow Gold Blue Agate Cameo Pendant/BroochEst. $800-$1,200$600Pittsfield, MAFontaine's Auction Gallery4.5(367)
Oct 6, 2026Sterling Silver Marcasite Multi-Stone Beetle BroochEst. $200-$400$100Dania Beach, FLAkiba Galleries4.7(2.1k)
6 days LeftLate 19th Century Scottish Agate Sterling Silver Brooch PendantEst. $1,352-$1,757$100New York, NYBidhaus4.3(882)
Oct 10, 2026The Georgian period (1714-1837) French aristocrats custom-made gold colorful agate cameo broochEst. $9,500-$15,000$9,500San Francisco, CAHEAVEN'S EARTH ANTIQUE CO LLC
Oct 3, 2026ROMAN AGATE CAMEO OF JULIUS CAESAR IN GOLD PENDANTEst. £1,500-£3,000£1,000London, UKApollo Art Auctions4.5(141)
2 days LeftHuge Gold Filled And Goldtone Discovery Lot Some Victorian Art Deco MCM Jumble BonanzaEst. $100-$500$250(4 bids)Tampa, FLRichard Stedman Estate Services LLC4.5(57)
Oct 3, 2026ROMAN AGATE INTAGLIO OF SILENUS IN GOLD PENDANTEst. £750-£1,500£500London, UKApollo Art Auctions4.5(141)
Ends in 11d 17hAntique Scottish Agate and Citrine Brooch in GoldEst. £200-£300£150 Gloucestershire Banks Jewellery Auctions4.4(14)
Ends in 11d 17hRare Vintage 9ct Gold Scottish Cabochon Moss Agate BroochEst. £500-£600£450 Gloucestershire Banks Jewellery Auctions4.4(14)
12 hrs Left18 kt gold cameo-brooch, approx. 1890Est. €320-€1,280€320Mutterstadt, Rheinland-PfalzHenry's Auktionshaus AG4.3(211)
Ends in 11d 17h3X SILVER AGATE CARVED TURTLE BROOCHEst. £60-£70£40 Gloucestershire Banks Jewellery Auctions4.4(14)