This is an authentic TIFFANY 18K Yellow Gold Trefoil Key Pendant Necklace. This elegant necklace is crafted of an 18 karat yellow gold chain that holds a trefoil key pendant. This is a magnificent necklace with the unforgettable style of Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.