Boucheron Colombian emerald and diamond ring. Centrally set with a cushion shape old mine cut natural Colombian emerald with indications of minor clarity enhancement in an open back claw setting with an approximate weight of 6.20 carats, further adorned with four drop shape old mine diamonds in open back claw settings with a combined approximate weight of 2.10 carats, to an impressive flanked solitaire design featuring double corner claws, a linear pierced gallery and open backholing, the raised shoulders flowing to a solid square shank. Marked platinum, signed 'Monture Boucheron', French, circa 1920, accompanied by Gubelin report #19090111.
