Item #: 208006 This is an authentic TIFFANY & CO 18K Yellow Gold Diamond Enchant Key Pendant Necklace. This charming 1.5 inch pendant is 18 karat yellow gold in the form of a heart key with a centered diamond. This is a charming piece 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.