Pretty openwork brooch in white gold (750) and platinum (950) decorated with geometric motifs set with small brilliant-cut and baguette-cut diamonds in pearl-grain setting, centered with a cushion-cut red glass in closed setting, and four lines of small calibrated synthetic rubies in pearl-grain setting. 750 white gold pin with safety chain. Art Deco period. Gross weight: 11 g. - Size: 2 x 4.7 cm. Minor wear scratches.