Diamond and sapphire brooch, circa 1930; of Art Deco design, the geometric motif composed of a corner-set old European brilliant-cut diamond weighing approximately 1.58 carats, a bezel-set marquise-shaped diamond weighing approximately 0.70 carats, framed by 12 synthetic sapphires upon a surround accented throughout with bead-set old round-cut diamonds together weighing approximately 1.77 carats, and 12 channel-set square-cut natural sapphires together weighing approximately 3.60 carats, mounted in platinum, length 30 mm, width 30 mm, total gross weight approximately 11 grams.