Year: 1992 This is an authentic CARTIER 18K Yellow Gold Blue Sapphire Colisee Ring 50 5.25. The ring is crafted of 18 karat yellow gold and features an oval blue sapphire cabochon centered along a crossover band. This is a classic 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.