This is an authentic ROBERTO COIN 18K White Gold Diamond Initial P Pendant Necklace. The necklace is crafted of 18 karat white gold and features a "P" letter pendant pave-set with approximately .05 total carat weight of diamonds, along with a hidden synthetic ruby on the back. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.