Item #: 1605124 This is an authentic DAVID YURMAN Sterling Silver Blue Sapphire Blue Topaz Doublet Milk Quartz Turquoise Chatelaine Long Necklace. The necklace is crafted of sterling silver and features blue sapphire, blue topaz, amethyst over hematine doublet, turquoise, and milky quartz. Follow this item for alerts. David Yurman is a registered trademark of David Yurman. FASHIONPHILE is not affiliated with David Yurman.