This is an authentic CARTIER 18K Yellow Gold Diamond .28ct Louis Cartier Engagement Ring 54 or 6.75. The ring is crafted of 18 karat yellow gold and features a single round brilliant cut diamond weighing approximately .28 carats, with F color and VS1 clarity. Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.