An art deco diamond and platinum brooch, Marcus
the elongated openwork brooch centering a bezel-set European-cut diamond, flanked by ten graduated bezel-set European-cut diamonds, fully framed by smaller old European-cut diamonds; signed Marcus; center diamond weighing an estimated: 3.30 carats; further estimated large diamond weights: 2.55, 2.30, 1.95, 1.85, 0.90, 0.85 carat(s); estimated total diamond weight: 21.20 carats; dimension: 4 x1 1/16in.