This is an authentic CARTIER Platinum .50ct Diamond 1895 Solitaire Engagement Ring in a size 51 or 5.75 US. This half carat round brilliant cut solitaire diamond is set in platinum with 20 beautiful channel set diamonds. This is a gorgeous ring, with a classic look, only from Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.