An Art Deco aquamarine and diamond brooch, circa 1930, the large aquamarine of vivid greenish-blue colour, measuring approximately 32mm x 22.3mm x 16.1mm, framed within a geometric surround with millgrain details, embellished with sixty-eight, well colour matched, pavé set old-cut and single-cut diamonds, secures to a screw-in brooch fitting, unmarked white metal mount testing platinum, brooch fittings testing as 18ct, dimensions 5cm x 2.9cm, cased in a Cartier egg-shaped box, gross weight 30grs