An onyx and diamond jabot pin, circa 1915 The frosted rock crystal with foliate engravings, surmounted with a pear-shaped onyx plaque, all with millegrain-set old brilliant and single-cut diamond border detail, to a similarly-decorated stylised arrowhead terminal, diamonds approx. 0.80ct. total, rock crystal chipped, length 11.0cm.
Art Deco carved amethyst Buddha with platinum and rose-cut diamond necklace topped by an openwork platinum and diamond-set halo, seated on a ribbed platinum and diamond cushion, tipped by an amethyst and diamond terminal, circa 1920,
AN ART DECO OPAL AND DIAMOND JABOT PIN Designed as a openwork single-cut diamond feather, centering upon a bezel-set rectangular cabochon opal within a calibré-cut emerald surround, joined by a single-cut diamond, calibré-cut emerald and sapphire terminal, mounted in platinum and 18k white gold, circa 1925, with French assay mark and maker's mark