This is an authentic TIFFANY 18K White Gold Platinum Diamond Medium Heart Lock Pendant Necklace. The necklace features an 18 karat white gold chain golding a platinum heart motif pendant with a center keyhole cutout pave set with sparkling diamonds, approximately .55 total carat weight. This is a stunning necklace with with timeless style of Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.