An Art Nouveau pearl and diamond pendant, circa 1900, of negligée design, set with circular-cut and

An Art Nouveau pearl and diamond pendant, circa 1900, of negligée design, set with circular-cut and cushion-shaped diamonds, suspending two asymmetrical knife wire pendants terminating in a circular-cut diamond and a pearl respectively, to a fine link chain, mounted in gold and platinum, chain length 40.5cm, pendant length 4.8cm, French import assay mark for platinum, pearl untested