Item #: 910793 This is an authentic TIFFANY 18K White Gold Diamond Knot Key Pendant Necklace. The necklace is crafted of 18 karat white gold and features a knot motif key accented with diamonds weighing approximately 0.21 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.