This is an authentic DAVID YURMAN Sterling Silver Diamond Chalcedony 10mm Chalcedony Ring size 46 or 3.75. The ring is crafted of sterling silver and features a polished 10mm chalcedony stone framed by a halo of pave diamonds, approximately .23 total carat weight. Follow this item for alerts. David Yurman is a registered trademark of David Yurman. FASHIONPHILE is not affiliated with David Yurman.