10k Fire Opal and Diamond BroochEstimate: $600 - $800Current Bid - 3 bids$350Branford, CTNew England Auctions - Fred Giampietro4.7(477)
Opal, Seed Pearl and 14K Gold BroochEstimate: $400 - $600Current Bid - 3 bids$200Branford, CTNew England Auctions - Fred Giampietro4.7(477)
Starts ANTIQUE OPAL AND DIAMOND CRESCENT BROOCH IN GOLDEstimate: £580 - £600Starting Bid£280 Gloucestershire Banks Jewellery Auctions4.4(17)
Starts Vintage Gold Opal Crescent BroochEstimate: £350 - £400Starting Bid£170 Gloucestershire Banks Jewellery Auctions4.4(17)
RUSSIAN 14K GOLD SILVER DIAMONDS OPALS 4 LEAF CLOVER BROOCHEstimate: $2,000 - $3,000Current Bid - 2 bids$100Brooklyn, NYAntique Arena Inc.4.5(1.1k)
Starts Vintage Large Opal and Diamond 15ct Gold Crescent BroochEstimate: £750 - £850Starting Bid£380 Gloucestershire Banks Jewellery Auctions4.4(17)
14 kt gold opal-brooch, approx. 1920Estimate: €290 - €1,160Starting Bid€290Mutterstadt, RPHenry's Auktionshaus AG4.3(212)
14K Yellow Gold Opal Filigree Brooch PendantEstimate: $350 - $550Starting Bid$175Windsor, CTNadeau's Auction Gallery4.7(456)
14 kt gold opal-diamond-brooch, 1920-30s yearsEstimate: €280 - €800Starting Bid€280Mutterstadt, RPHenry's Auktionshaus AG4.3(212)
Kabana Masterpiece Natural Australian Opal 14k Gold Diamond Dolphin Shark BroochEstimate: $1,000 - $1,500Current Bid - 1 bid$10St Petersburg, FLHess Fine Auctions4.5(255)
Elegant Antique Victorian European 8K Gold, White Opal & Seed Pearl Accents BroochEstimate: $200 - $400Starting Bid$25Miami, FLPandora Auctions4.5(237)
14K Yellow Gold Lightning Ridge Black Opal Bar BroochEstimate: $9,500 - $12,000Starting Bid$2,400Rockville, MDInterGem Premier Auctions
OPAL AND DIAMOND BROOCH, CIRCA 1920Estimate: £4,000 - £6,000Starting Bid£4,000England, LondonBonhams4.1(429)
Ends in 2d 8hOpal and Diamond Crescent Brooch in 9ct GoldEstimate: £250 - £300Starting Bid£120 Gloucestershire Banks Jewellery Auctions4.4(17)
AN OPAL AND 18K GOLD BROOCH, "KING OF THE INDIANS"Estimate: $5,000 - $8,000Starting Bid$1,000CHATHAM, NJZovelle Auction lnc
ANTIQUE OPAL AND DIAMOND CRESCENT BROOCHEstimate: £600 - £1,200Starting Bid£300London, UKEtrusca Auctions4.1(30)
Buy NowAntique 18k Yellow Gold Diamond Opal Blue Enamel Pendant Brooch Pin OG527$750Lakeway, TXEco Estate Jewelry4.3(7)
Vintage Opal 2.00ct Diamond Enamel 18K Platinum Fish Pin Brooch 10 GramsEstimate: $2,500 - $3,500Starting Bid$90Miami, FLDover Jewelry4.5(29)
18K ROSE GOLD AND STERLING SILVER 4.20CT DIAMOND, OPAL, AND CONCH PEARL LOVEBIRDS BROOCHEstimate: $18,000 - $45,000Starting Bid$18,000Las Vegas, NVRobinhood Auctions4.7(887)
Buy NowAntique 14K Yellow Gold Large Opal Brooch$5,850Broomall, PAEastern European Art Gallery Inc4.3(4)
Buy NowANTIQUE ART DECO PLATINUM & 18K YELLOW GOLD AUSTRALIAN FIRE OPAL PIN BROOCH$5,091Valley Village, CAModern Jewelry4.4(225)
Native American TSF Sterling Silver Opal Inlay Lizard Brooch and pendant 14gEstimate: $10 - $200Current Bid - 3 bids$50Sun Prarie, WISphere Auctions LLC4.5(216)
Peacock Brooch Pendant 13-14k Yellow Gold Opal Sapphire Emerald GarnetEstimate: $2,964 - $3,853Starting Bid$100New York, NYBidhaus4.3(887)