This is an authentic CARTIER Platinum Diamond .80ct Solitaire 1895 Engagement Ring size 52 or 6. The ring is crafted of platinum and features a four prong-set round brilliant cut diamond weighing approximately .80 carat, with F color and IF clarity grade. Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.