Year: 1992 This is an authentic CARTIER 18K Yellow Gold Diamond Ruby Colisee Ring 50 5.25. The ring is crafted of 18 karat yellow gold and features an X crossover style band holding an oval ruby cabochon stone and two round brilliant diamonds, approximately .05 total carat weight. Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.