This is an authentic ROBERTO COIN 18K Yellow Gold Amethyst Shanghai Earrings. The earrings are crafted of 18 karat yellow gold and features amethyst and mother of pearl doublets in a four-prong setting. The earrings also features the signature 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.