This is an authentic ROBERTO COIN 18K Yellow Gold Diamond Letter B Pendant Necklace. The necklace is crafted of 18 karat yellow gold and features a letter "B" motif pendant with rope detailing and a single round brilliant cut diamond weighing approximately .04 carat. The necklace also features a synthetic ruby stone set on the chain. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.