Item #: 1268426 This is an authentic TIFFANY Platinum 18K Yellow White Gold Yellow Diamond Crown Key Pendant Necklace. The necklace chain is crafted of 18 karat white gold and features a platinum crown key pendant lined with pave set diamonds and a fancy yellow diamond set in 18 karat yellow gold, with a total approximate carat weight of .44 carats. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.