Ruby and diamond brooch, circa 1930 of geometric design, centring an emerald cut diamond weighing approximately 1.20 carats collet set within an openwork frame of round brilliant cut diamonds to matching diagonally set plaques of calibre cut rubies and baguette cut diamonds arranged in a cross stitch pattern, the small diamonds together weighing approximately 7.20 carats, mounted in platinum, French assay marks, approximately 50 x 30 mm.