Colombian emerald and diamond coronet cluster ring. Set to centre with an octagonal emerald-cut natural Colombian emerald with minor clarity enhancement in an open back rubover setting with an approximate weight of 2.20 carats, further set with thirty round eight cut diamonds in open back grain settings with a combined approximate weight of 0.60 carats, all to an elegant elongated cluster design featuring millegrain edging, a geometric pierced gallery and open backholing, leading to raised shoulders and flowing through to a solid slim shank. Tested platinum, circa 1920, accompanied by Gemmological Certification Services report #81313-82.
