Art Nouveau Moonstone and Gold Necklace, Circa 1890

An Art Nouveau moonstone and gold necklace, featuring a pendant, with an Art Nouveau design, with an oval moonstone, in a rub over setting, suspending a cushion shaped silver moonstone, rub over set in a framed scrolling openwork surround, on a chain of rub over set blue moonstones, alternating with ribbed bars and openwork trefoil cylinders, mounted in gold, electronically tests as 18ct gold, with a jump and bolt ring clasp, which is stamped 14K, with inventory mark 04331, circa 1890.