This is an authentic ROBERTO COIN 18K Yellow Gold Diamond Enamel Bollicine Ring size 53 or 6.5 in White. The ring is crafted of 18 karat yellow gold and features a wide band composed of an openwork of round motifs set with white enamel and diamonds, approximately .07 total carat weight. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.