Cartier Paris 1930s Cushion Shaped Old Mine Diamond Engagement Ring For Sale at 1stDibs | 1930 cartier platinum and diamond ring, cartier engagement rings, cartier cushion cut engagement rings
Check out Mary-Kate Olsen's vintage Cartier engagement ring - Telegraph
$14,500 Cartier vintage Platinum GIA 0.90ct Oval Diamond Engagement Ring | eBay