An Art Deco emerald and diamond pendant/brooch, 1920s, of pierced design, the central marquise-cut diamond collet set within a cartouche-shaped plaque, mounted with single-cut diamonds and calibre-cut emerald accents, with retractable diamond-set pendant fittings, mounted in platinum, one diamond and one emerald deficient, pendant length 7 cm, brooch width 4.5 cm