This is an authentic pair of ROBERTO COIN 18K White Gold Black Diamond Inside Outside Hoop Earrings. The earrings are crafted of 18 karat white gold and feature open oval hoops pave-set with black diamonds, approximately .98 total carat weight, along with two hidden synthetic rubies. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.