AN ART DECO EMERALD AND DIAMOND PLAQUE BROOCH,

unmarked, circa 1920, of rectangular pierced form, centered a rectangular mix-cut emerald (c.6.4mm x 5.3mm x 3.0mm), flanked either side by two round mix-cut diamonds (c.2.28 total carat) and two more diamonds to the top and bottom (c.0.50 total carat), one-hundred and twenty diamonds (c.6.28 total carat) in rub-over and grain set with a mill-grained edge in platinum (c.13.7grams). 50mm wide x 23mm high