Live NowFrench 18K Gold Platinum Diamond Flower Brooch En Tremblant 4.20 CtEst. $8,593-$11,170$100Mynt AuctionsNew York, NY
14 hrs LeftLinda Lee Johnson Platinum Brooch 114 Diamonds 6.25 Ct D-F VVS-VSEst. $5,473-$7,114$100BidhausNew York, NY
2 days LeftStunning Retro Platinum Brooch with 13 Carats of DiamondsEst. $11,661-$15,159$100BidhausNew York, NY
Live NowEdwardian Platinum and White Gold Diamond Filigree Floral Bar Pin BroochEst. $2,015-$2,619$100BidhausNew York, NY
Live Now1960's Platinum Diamond Brooch 12.00 Ct with 31 Round DiamondsEst. $10,842-$14,094$100BidhausNew York, NY
2 days LeftPlatinum Art Deco Brooch with Central 0.45 Ct Diamond and 28 AccentsEst. $3,302-$4,292$100BidhausNew York, NY
Jul 18, 2026PT900 PLATINUM K14 BROOCH GREEN DIAMONDEst. $2,250-$3,300$25NY Elizabeth Beverly Hills, CA
2 days Left1950's Platinum Diamond Brooch 11.00 Ct F-G VVS-VS 2.5 InchesEst. $9,958-$12,945$6,400BidhausNew York, NY
2 days Left1950's Platinum Brooch with 4cts Diamonds and Multicolor GemstonesEst. $21,164-$27,513$100BidhausNew York, NY
23 hrs LeftArt Deco Platinum Brooch 7.15 Ct Diamonds Marquise 0.65 CtEst. $6,708-$8,720$100BidhausNew York, NY
Jul 24, 2026Edwardian Art Nouveau style two-color gold antique diamond brooch 22k gold platinum old cut diamond.Est. $1,600-$5,000$1,600HEAVEN'S EARTH ANTIQUE CO LLCSan Francisco, CA
3 days LeftArt Deco Platinum Brooch with 3.00 Ct Ruby and 96 DiamondsEst. $9,074-$11,796$100BidhausNew York, NY
3 days LeftEdwardian Era 18k Gold Platinum Bar Brooch With GIA Ceylon Sapphire No HeatEst. $3,874-$5,036$100BidhausNew York, NY
Live Now1960's Platinum Diamond Brooch 7.25 Ct F-H Color VVS-VS ClarityEst. $5,473-$7,114$100BidhausNew York, NY
Jul 25, 2026GIMEL DIAMOND BEE PIN BROOCH 18K 750 YELLOW GOLD/950 PLATINUMEst. $4,500-$6,600$25NY Elizabeth Beverly Hills, CA
2 days Left1950's Platinum Brooch 7.70 Ct Diamonds F-G VVS-VSEst. $6,630-$8,619$100BidhausNew York, NY
23 hrs LeftArt Deco Platinum Brooch 4.30 Ct Diamond 69 StonesEst. $4,602-$5,982$100BidhausNew York, NY
3 days LeftPlatinum Art Deco Diamond Brooch with 5.25 Carats G-H VVS-VS StonesEst. $5,005-$6,506$2,450BidhausNew York, NY
2 days LeftEdwardian Platinum Brooch with 2.5 Carat Old-European Cut DiamondsEst. $4,862-$6,320$100BidhausNew York, NY
Live NowAGL Certified Retro Brooch with Sapphire Ruby Diamond in 18K Gold and PlatinumEst. $23,881-$31,045$15,250BidhausNew York, NY
Live NowArt Deco Platinum Brooch 20.00 Ct Diamonds G-J VS1-SI1Est. $33,397-$43,416$100BidhausNew York, NY
7 days LeftRECTANGULAR BROOCH IN 18 KT YELLOW GOLD AND PLATINUM WITH DIAMONDSEst. €1,500-€2,000€1,000SPANGARO & COUdine, Italy
Jul 26, 2026KASHIKEY DIAMOND MARQUISE-CUT BROOCH 950 900 PLATINUMEst. $2,175-$3,190$25NY Elizabeth Beverly Hills, CA
3 days LeftElegant 18K Platinum 6.05 Ct Diamond Brooch with 106 DiamondsEst. $5,408-$7,030$100BidhausNew York, NY