AN ART DECO DIAMOND JABOT BROOCH Designed as two circular and baguette-cut diamond terminals of geometric design, joined by two jabot pins, circa cm. long, with French assay marks for platinum and gold
ART DECO - Designed as a pierced single and circular-cut diamond geometric plaque, centering upon a pear-shaped diamond, accented by a rectangular-cut diamond and onyx detail, mounted in platinum, circa 1925
FOUR DIAMOND CLIPS, CIRCA 1930. Each open work clip of shield design, set with circular- and single-cut diamonds; together with a later hinged bangle, the terminals can be fitted with two of the clips, bangle unillustrated, circumference approximately 165mm.
Very early Art Deco, I'd say. It's the classic platinum, diamonds, and sapphires, but its overall shape is like a rigid version of a common Nouveau design - Leigh ** Magnificent Art Deco Diamond and Sapphire Brooch Art Deco
A late art deco diamond and aquamarine brooch, circa 1935 designed as a Japanese pagoda of rectangular-cut aquamarines and single-cut diamonds, shaded by a pine tree of round brilliant and single-cut diamonds, on a baguette-cut diamond base ^