Art Deco Platinum and Gold Sapphire and Diamond Negligée Necklace

An Art Deco negligée necklace with knife-edge and paper clip chain with sapphires and old European-cut and rose-cut diamonds and European touch marks, set in platinum and 18K yellow gold. Circa 1920.

• Fan-shaped sapphires: 2.30 carats
• Calibré-cut synthetic sapphires
• Diamonds: 0.85 total carat weight, H-J color, VS1-SI2 clarity