SaveBuy NowVintage Cartier 4.64ctw No Heat Oval Sapphire Diamond Ring with BoxDiamond Depot4.3(10)$45,350
Save6 days LeftVintage GIA Certified 1.02ctw Alexandrite Diamond Ring in PlatinumBidhaus4.2(837)Est. $16,276-$21,158$12,500
SaveBuy NowAntique Art Deco Platinum Cushion Diamond Sapphire Halo Ring 1.85ctwDiamond Depot4.3(10)$6,600
Save5 days LeftVintage Platinum GIA 2.93ctw Emerald Cut Baguette Diamond Engagement RingBidhaus4.2(837)Est. $25,792-$33,529$19,750
Save5 days LeftAntique Art Deco Platinum GIA Certified 1.76ctw Diamond Solitaire RingDiamond Depot4.3(10)Est. $14,283-$16,711$4,550
SaveBuy NowVintage GIA Certified 1.02ctw Alexandrite Diamond Ring in PlatinumDiamond Depot4.3(10)$15,850
SaveBuy NowGIA Certified 7.38ct Colombian Emerald Platinum Diamond Ballerina RingDiamond Depot4.3(10)$18,640
Save5 days LeftAntique Art Deco Platinum Cushion Diamond Sapphire Halo Ring 1.85ctwBidhaus4.2(837)Est. $6,773-$8,804$100
Save2 days LeftDavid Webb 18K Gold Platinum Diamond Panda Bear Ring 1.10 CtBidhaus4.2(837)Est. $14,547-$18,911$100
SaveFeb 18, 2026LAMBERT BROTHERS 1925 Art Deco Toi Et Moi Ring In Platinum Sapphires & DiamondsPlatinum Auction Group4.3(68)Est. $9,950-$10,945$950
SaveBuy NowVintage Platinum GIA 2.93ctw Emerald Cut Baguette Diamond Engagement RingDiamond Depot4.3(10)$25,120
SaveBuy NowTiffany & Co. Vintage Platinum GIA 1.52ct Oval Diamond Engagement RingBidhaus4.2(837)$16,780
SaveBuy NowPlatinum AGL GIA Cushion Pink Sapphire Ruby Diamond Engagement RingDiamond Depot4.3(10)$14,000
SaveBuy NowTiffany & Co. Vintage Platinum GIA 1.52ct Oval Diamond Engagement RingDiamond Depot4.3(10)$16,780
Save5 days LeftPlatinum 3.05ct AGL Burma No Heat Oval Sapphire & GIA Diamonds Engagement RingDiamond Depot4.3(10)Est. $27,097-$31,703$11,000
SaveBuy NowAntique Art Deco Platinum GIA Certified 1.76ctw Diamond Solitaire RingBidhaus4.2(837)$7,380(13 bids)
SaveBuy NowGIA Certified 6.01ct Natural Burma Sapphire Platinum Diamond RingDiamond Depot4.3(10)$13,880
SaveBuy NowGIA Certified 5.93ct Royal Blue Sapphire Diamond Ring in PlatinumDiamond Depot4.3(10)$11,130
Save3 days LeftPlatinum GIA 3.73ctw Color Change Alexandrite Diamond Cocktail RingDiamond Depot4.3(10)Est. $21,707-$25,397$8,800