This is an authentic ROBERTO COIN 18K White Gold Diamond Venetian Princess Flower Ring 53 6.5. The ring is crafted of 18 karat white gold and features a flower motif pave-set with diamonds, approximately .45 total carat weight, along with a synthetic ruby 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.