Item #: 1708389 This is an authentic TIFFANY 18K White Gold Diamond Atlas Pierced Key Pendant Necklace. This charming pendant is 18 karat white gold in the form of a key with Roman numerals and four diamonds weighing approximately .02 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.