Columbia emerald and diamond pendant brooch (1950/60s)

Columbia emerald and diamond pendant brooch (1950/60s)
mounted in platinum and 18kt yellow gold, four emeralds, one is oval cut circa 2.50 ct, one pear cut circa 3.40 ct and two octagonal circa 2.40 ct alternating with antique brilliant cut diamonds, oval cut briolet and huit-huit for a total of circa 4.10 ct, complete with silk cord, white gold and diamonds, length 100 cm. Gemological certificate I.G.N. n. 29130, peso 26 gr.