This is an authentic ROBERTO COIN 18K Yellow Gold Diamond .19ct Pear Cut Pendant Necklace. The necklace is crafted of 18 karat yellow gold and features a single pear cut diamond, approximately .19 carat, along with a synthetic ruby on the back of the pendant. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.