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 1.00 carats, encircled by fourteen round old cut diamonds in open back grain settings with a combined approximate weight of 0.60 carats, and further set with fourteen round eight-cut diamonds in open back grain settings with a combined weight of 0.26 carats. The total approximate diamond weight is 0.86 carats, to a geometric cluster design featuring millegrain and polished borders, a decoratively pierced gallery and fancy shape open backholing, leading to raised split shoulders, and flowing through to a solid D-shape shank. Tested platinum, circa 1920, accompanied by Gemmological Certification Services report #5782-3015.
