This is an authentic CARTIER 18K White Gold Diamond 4mm Happy Birthday Band Ring size 54 or 6.75. The ring is crafted of 18-karat white gold and features the signature Cartier double C logo engraved throughout the band with five bezel-set round brilliant cut diamonds, approximately .10 total carat weight. Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.