This is an authentic ROBERTO COIN 18K Rose Gold Diamond .49ctw Bezel Stud Earrings. The earrings are crafted of 18 karat rose gold and feature round brilliant cut diamonds, approximately .49 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.