This is an authentic CARTIER 18K White Gold Diamond 6mm Tank Francaise Band Ring size 52 6. The ring is crafted of 18 karat white gold and features a Tank de Cartier motif band set with round brilliant cut diamonds, approximately .15 total carat weight. This is a modern ring with the iconic style of Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.