Platinum, Diamond and Emerald Brooch The pierced cartouche centering 3 rectangular-cut diamonds, flanked by 2 rectangular-cut diamonds, totaling ap. 4.60 cts., edged and tipped by square, fancy-shaped and rectangular-cut emeralds, set throughout with 132 old European and single-cut diamonds ap. 4.15 cts., circa 1920, ap. 11.2 dwts. C