This is an authentic DAVID YURMAN Darkened Sterling Silver Blue Topaz Sapphire 20mm Chatelaine Ring 54 7. The ring is crafted of darkened sterling silver and feature a faceted 20mm blue topaz stone and round cut blue sapphire stones and a split shank band. Follow this item for alerts. David Yurman is a registered trademark of David Yurman. FASHIONPHILE is not affiliated with David Yurman.