This is an authentic TTIFFANY & CO 18K Yellow Gold Heart Lock Pendant Necklace. This lovely necklace is collar length and is 18 karat yellow gold. The pendant is a simply delightful heart shaped skeleton lock and a matching key, both in 18 karat gold. This a lovely necklace with the unforgettable style of Tiffany & Co! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.