This is an authentic DAVID YURMAN Darkened Sterling Silver Diamond Blue Topaz 20mm Chatelaine Ring size 57 or 8. This lovely and stylish ring has a dark sterling silver cable style with a 20mm blue topaz stone surrounded by diamonds weighing approximately .62 total carat weight. This is a beautiful ring with a distinctive look, from David Yurman! Follow this item for alerts. David Yurman is a registered trademark of David Yurman. FASHIONPHILE is not affiliated with David Yurman.