SaveMar 08, 2026PLATINUM ENGAGEMENT RING 2.18CT. CUSHION SHAPE LAB-GROWN DIAMOND E-VS1 IGI CERTModern Jewelry4.5(204)Est. $8,245-$9,215$6,700
SaveBuy NowAntique Art Deco Platinum 0.73ct Diamond Filigree Octagonal RingDiamond Depot4.3(10)$2,890
SaveLive NowPlatinum 2.83ctw Oval Cabochon Opal Diamond Halo Cocktail RingDiamond Depot4.3(10)Est. $3,087-$3,611$920
SaveBuy NowVintage Platinum 1.35ct Floating Diamond Engagement Ring with AccentsDiamond Depot4.3(10)$2,330
SaveBuy NowRachel Koen GIA Certified Halo Diamond Engagement Ring Platinum 1.28ctsMynt Auctions4.4(830)$8,220(15 bids)
Save7 days LeftGIA Certified 1.81ct Oval Blue Sapphire Diamond Platinum Cocktail RingDiamond Depot4.3(10)Est. $4,036-$4,843$1,150
SaveBuy Now18k Yellow Gold Platinum GIA Emerald Baguette Diamond Ring 4.1ctwBidhaus4.2(838)$17,700(20 bids)
SaveFeb 20, 2026Platinum 4.28ctw Natural Cat's Eye Ring with Baguette DiamondsDiamond Depot4.3(10)Est. $4,192-$5,030$1,500
SaveFeb 23, 2026Platinum 6.97ct Jelly Opal Diamond Cocktail Ring Oval CabochonDiamond Depot4.3(10)Est. $4,526-$5,432$1,275
SaveBuy NowPlatinum Ring with 5.25ct Blue Star Sapphire and Diamond Accents Vintage Bypass DesignDiamond Depot4.3(10)$2,890
Save6 days LeftPlatinum 1.48ctw Mexican Fire Opal Diamond Ring Size 7.5Diamond Depot4.3(10)Est. $4,036-$4,843$1,225
SaveBuy NowPlatinum 7.85ctw GIA Ceylon No Heat Sapphire Diamond Cocktail RingBidhaus4.2(838)$13,970(15 bids)
SaveBuy NowElegant GIA Certified 1.69ct Platinum Teardrop Diamond Stud EarringsBidhaus4.2(838)$6,590(17 bids)
SaveFeb 20, 2026Platinum Ring with 5.25ct Blue Star Sapphire and Diamond Accents Vintage Bypass DesignDiamond Depot4.3(10)Est. $5,084-$6,101$1,500
SaveBuy Now2.90ct GIA Fancy Intense Yellow Diamond Engagement Ring in Platinum & 18K Yellow GoldBidhaus4.2(838)$45,120(16 bids)
SaveFeb 20, 2026A Love Defined by Clarity, Platinum Diamond RingTurtle Bay AuctionsEst. $6,319-$8,426$2,750
SaveMar 08, 2026VINTAGE PLATINUM ENGAGEMENT RING 2.18CT.NATURAL CHAMPAGNE DIAMOND BLUE SAPPHIREModern Jewelry4.5(204)Est. $7,395-$8,265$6,000