Belle Epoque Platinum, White Gold, Amethyst and Diamond Necklace, France. Centering 3 oval amethysts approximately 16.0 x 20.5 mm. and 10.4 x 13.4 mm., quartered by diamond-set scalloped segments, joined by diamond-set scrolled links, completed by delicate pierced fancy-shaped links, each embellished by a round cabochon amethyst, set throughout with old-mine and rose-cut diamonds, with French assay marks, circa 1890, approximately 18.5 dwt. Length 15 3/4 inches. Via Doyle New York.