Item #: 1178765 This is an authentic TIFFANY Platinum 18K White Gold Diamond Mini Heart Key Pendant Necklace. The necklace features an 18 karat white gold chain holding a platinum key motif pendant set with round brilliant cut diamonds weighing approximately .12 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.