4 days LeftPlatinum GIA 3.03ct No Heat Pinkish Purple Sapphire Diamond RingEst. $8,265-$9,257$3,700Diamond DepotNew York, NY
5 days LeftPlatinum GIA 2.37ct Ceylon Sapphire Diamond Cocktail RingEst. $6,497-$7,277$2,900Diamond DepotNew York, NY
6 days LeftElegant Platinum Cluster Diamond Earrings 17.65 CaratsEst. $75,250-$84,280$34,000Diamond DepotNew York, NY
Buy NowVINTAGE CARTIER MONTURE PLATINUM DIAMOND BROOCH PIN CLIP$21,590Modern JewelryValley Village, CA
Jul 21, 2026VINTAGE CARTIER MONTURE PLATINUM DIAMOND BROOCH PIN CLIPEst. $21,590-$24,130$17,750Modern JewelryValley Village, CA
5 days LeftGIA Platinum Princess Diamond Sapphire Engagement Ring 2.58ctwEst. $16,287-$18,242$5,100Diamond DepotNew York, NY
5 days LeftPlatinum GIA Pink Sapphire Diamond Ballerina Pendant NecklaceEst. $7,381-$8,267$2,150Diamond DepotNew York, NY
5 days LeftVintage 6.5ctw Diamond Leaf Brooch in Gold and PlatinumEst. $17,812-$19,950$5,700Diamond DepotNew York, NY
5 days LeftGIA Certified 1.5ctw Colombian Emerald Diamond Ring in PlatinumEst. $5,038-$5,643$1,450Diamond DepotNew York, NY
5 days LeftVintage Platinum Bracelet 21 Carat Pear Marquise Baguette Diamonds 1970sEst. $69,482-$77,820$20,000Diamond DepotNew York, NY
Buy NowPlatinum Floral Brooch with 11.60 Carats of Diamonds Circa 1950s$11,750Diamond DepotNew York, NY
Jul 15, 2026TIFFANY & CO. 1.50 CARAT EMERALD 1.34 DIAMOND PLATINUM THREE-STONE RINGEst. $30,000-$33,529$24,500Modern JewelryValley Village, CA
5 days LeftBlue Nile Platinum 0.60ctw Channel Set Diamond Wedding Band RingEst. $2,784-$3,118$900Diamond DepotNew York, NY
Starts Jul 07*Vintage Diamond and Platinum Solitaire RingEst. £1,000-£1,050£700Banks Jewellery Auctions Gloucestershire
Jul 15, 20261.22 CARAT CIRCULAR BRILLIANT AND OLD EUROPEAN DIAMOND PLATINUM ART DECO RINGEst. $13,000-$14,529$10,500Modern JewelryValley Village, CA
Jul 16, 20261.95 CARAT OLD EUROPEAN AND CIRCULAR BRILLIANT DIAMOND PLATINUM ART DECO RINGEst. $9,500-$10,618$7,800Modern JewelryValley Village, CA
Starts Jul 07Outstanding Aquamarine And Diamond Square Cocktail Ring Set In PlatinumEst. £2,200-£2,400£2,000Banks Jewellery Auctions Gloucestershire
6 days LeftPlatinum Cat's Eye Diamond Halo Cocktail Ring Size 5.5Est. $8,265-$9,257$3,700Diamond DepotNew York, NY
6 days LeftAntique Art Deco Platinum Diamond Stackable Wedding Band Ring 5.5Est. $3,027-$3,391$910Diamond DepotNew York, NY
5 days LeftGIA Certified 3.81ctw Platinum Pear Diamond Engagement RingEst. $72,930-$81,681$24,500Diamond DepotNew York, NY
5 days LeftVintage Platinum 5.52ctw Long Cushion Topaz Ring with DiamondsEst. $3,690-$4,133$1,650Diamond DepotNew York, NY
5 days LeftPlatinum 0.92ct Square Ruby Ring with Baguette DiamondsEst. $3,425-$3,836$1,175Diamond DepotNew York, NY
5 days LeftVintage Platinum 4.88ct Oval Opal Diamond Halo Cocktail RingEst. $4,221-$4,727$1,900Diamond DepotNew York, NY