This is an authentic DAVID YURMAN Sterling Silver Diamond Black Onyx 8mm Chatelaine Ring 55 7.25. The ring is crafted of sterling silver and features a 8mm black onyx stone held by diamond accented prongs, approximately .02 total carat weight. Follow this item for alerts. David Yurman is a registered trademark of David Yurman. FASHIONPHILE is not affiliated with David Yurman.