This is an authentic CARTIER 18K White Gold Diamond .33ct Louis Cartier Engagement Ring 51 5.75. The ring is crafted of 18 karat white gold and features a single round brilliant cut diamond weighing approximately .33 carat, with F color and VS1 clarity. Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.