This is an authentic JOHN HARDY Sterling Silver 18K Yellow Gold Diamond 7.5mm Classic Chain Necklace. The necklace is crafted of sterling silver and features a flexible mesh chain with a large box clasp set with round cut diamonds, approximately .30 total carat weight. The box clasp also features an 18 karat John Hardy logo on the reverse side. Follow this item for alerts. John Hardy is a registered trademark of John Hardy. FASHIONPHILE is not affiliated with John Hardy.