This is an authentic CARTIER 18k Yellow Gold Diamond Constellation Trinity Ring Size 50 US 5.25. This stunning ring is 18 karat gold with a criss cross of three 18 karat gold diamond studded bands. This is a marvelous ring with the classical style only from Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.