This is an authentic TIFFANY 18K Yellow Gold Diamond Knot Necklace. The necklace is crafted of 18 karat yellow gold and features a stylized knot motif station pave-set with round brilliant cut diamonds, approximately .25 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.