Item #: 437603 This is an authentic CARTIER 18K White Gold Diamond 4mm Happy Birthday Band Ring 49 5. The ring is crafted of 18 karat white gold and features the iconic Cartier logo engraved throughout the band with five bezel set round brilliant cut diamonds. This is an elegant ring with the signature style of Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.