Year: 2005 This is an authentic CARTIER 18K White Gold Diamond C De Cartier Ring 51 5.75. The ring is crafted of polished 18 karat white gold and features a wide band with Cartier's signature double C logo set with a single diamond weighing approximately .15 carats. Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.