This is an authentic ROBERTO COIN 18K White Gold Diamond Curved Bar Pendant Necklace. The necklace is crafted of 18 karat white gold and features a curved bar motif set with round brilliant cut diamonds, approximately .58 total carat weight, along with the signature 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.