This is an authentic DAVID YURMAN Sterling Silver Diamond Black Onyx 11mm Chatelaine Necklace. This stunning necklace is composed of a sterling silver box chain that holds a 11mm black onyx stone in a cable accented square setting with diamond prongs, approximately .05 total carat weight. Follow this item for alerts. David Yurman is a registered trademark of David Yurman. FASHIONPHILE is not affiliated with David Yurman.