This is an authentic CARTIER 18K Yellow Gold Peridot 6mm Tank Ring 50 5.25. This lovely ring is crafted of 18 karat yellow gold and features a green peridot stone at the center. Enjoy this ring for a look of pure elegance and sophistication only from Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.