This is an authentic ROBERTO COIN 18K Yellow Gold Diamond ..20ctw Bezel Stud Earrings. The earrings are crafted of 18 karat yellow gold and features round brilliant cut diamonds in a bezel setting, approximately .20 total carat weight, along with synthetic rubies on the back. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.