Item #: 524952 This is an authentic CARTIER 18K White Gold 4mm Happy Birthday Band Ring 49 4.75. This ring is crafted of 18 karat white gold and features the Cartier logo engraved throughout the band. This is an elegant ring with a distinctive look, only from Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.