This is an authentic ROBERTO COIN 18K Yellow Gold Diamond Lock Love Pendant Necklace. This necklace is crafted of 18 karat yellow gold featuring a heart shaped lock motif accented with diamonds, weighing approximately .54 total carat weight, along with a synthetic ruby on the bottom of the pendant and on the designer tag by the clasp. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.