This is an authentic ROBERTO COIN 18K White Gold Diamond Half Band Ring 52 6. The ring is crafted of 18 karat white gold and features a row of brilliant diamonds weighing approximately .10 total carat weight. The ring also features the signature synthetic ruby stone set on the inside of the band. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.