19 hrs LeftArt Deco Platinum Bracelet 30 Carats Old Euro Mine DiamondsEst. $68,042-$88,454$100BidhausNew York, NY
Jul 16, 2026Platinum Diamond Sapphire 3-Stone Engagement RingEst. $3,000-$5,000$1,500Auctions at ShowplaceAstoria, NY
2 hrs LeftEDWARDIAN PLATINUM 1.11 CT. DIAMOND ENGAGEMENT RING.Est. $2,000-$3,000$1,800(2 bids)William Smith AuctionsPlainfield , NH
3 days LeftArt Deco Platinum Bracelet 17.40ct Round Baguette Diamonds VintageEst. $37,960-$49,348$100BidhausNew York, NY
6 days LeftElegant Platinum Cluster Diamond Earrings 17.65 CaratsEst. $44,265-$57,544$100BidhausNew York, NY
4 hrs LeftElegant Platinum Cluster Diamond Earrings 17.65 CaratsEst. $44,265-$57,544$100BidhausNew York, NY
2 days LeftTiffany & CO. Platinum Diamond Bubble Drops EarringsEst. $14,000-$16,000$13,000Auction Plus, Inc.Costa Mesa, CA
5 days LeftVintage Platinum Bracelet 21 Carat Pear Marquise Baguette Diamonds 1970sEst. $40,872-$53,133$100BidhausNew York, NY
4 days LeftDiamonds by the Yard Necklace Platinum 7.50ct Round 18 InchEst. $11,661-$15,159$100BidhausNew York, NY
Jul 08, 2026Diamond, Sapphire & Platinum Dress Shirt SetEst. $1,500-$2,000$750Kodner Galleries Inc.Dania Beach, FL
Jul 10, 2026Ladies' Hamilton Art Deco Platinum Diamond Wristwatch, App. Total Wt.- 18.8 grams, L.- 6 in.Est. $1,500-$2,500$1,200Crescent City Auction GalleryNew Orleans, LA
2 days LeftGIA Tsavorite Diamond Ring Platinum 18k Yellow Gold Cushion 4.39ctw Size 6.5Est. $8,658-$11,255$5,000BidhausNew York, NY
4 days LeftPlatinum GIA Certified 5.57ct Green Burma Jade Diamond Accent RingEst. $14,378-$18,691$100(1 bid)BidhausNew York, NY
19 hrs LeftTiffany & Co. True Collection Platinum Engagement Ring with 1.01ct Square Mixed DiamondEst. $10,504-$13,655$100(1 bid)BidhausNew York, NY
Jul 17, 2026Gorgeous Platinum Pave' Set Diamond RingEst. $3,500-$4,000$1,700Link Auction GalleriesSaint Louis, MO
Jul 19, 2026Edwardian French Platinum-Topped 18K Gold Convertible Brooch-PendantEst. €2,000-€2,500€1,500Horizontal EncherePuteaux, paris
Jul 08, 2026Deco Diamond & Platinum Pendant / BroochEst. $2,000-$3,000$1,000Kodner Galleries Inc.Dania Beach, FL
5 days LeftPlatinum Tennis Bracelet 7.48ct Round Brilliant Diamonds Shared Prong SettingEst. $14,378-$18,691$100BidhausNew York, NY
Jul 08, 2026GIA Certified 2.64 Ct Blue Sapphire and Diamond Platinum RingEst. $2,000-$3,000$850(2 bids)Coral Gables AuctionCoral Gables, FL
Jul 13, 2026LARGE Antique Victorian Platinum and Diamond Bar Pin 5"H x 5/16"WEst. $1,500-$2,500$600Ripley AuctionsIndianapolis, IN
Jul 08, 2026Oscar Friedman Platinum Tanzanite and Diamond RingEst. $2,500-$3,000$1,100(2 bids)Coral Gables AuctionCoral Gables, FL
Live NowPlatinum Brooch with 23 Sapphire and Diamond Leaf DesignEst. $7,579-$9,852$100(1 bid)Mynt AuctionsNew York, NY