Item #: 1751734 This is an authentic TIFFANY 18K Yellow Gold Diamond Medium Lock Pendant Necklace. The necklace is crafted of 18 karat yellow gold and features an oval lock motif pendant set with round cut diamonds, approximately .33 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.