This is an authentic ROBERTO COIN 18K Yellow Gold Diamond .17ct Emerald Cut Solitaire Pendant Necklace. The necklace is crafted of 18 karat yellow gold and features a bezel-set emerald cut diamond, approximately .17 carat, along with with a synthetic ruby near the clasp. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.