Item #: 426012 This is an authentic CARTIER 18K Pink Gold 8mm Happy Birthday Band Ring 49 5. The ring is crafted of 18 karat pink gold and features the iconic Cartier logo engraved throughout the rounded band. This is a beautiful ring with the bold style of Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.