Colombian emerald and diamond flanked solitaire ring. Set to centre with an octagonal emerald-cut natural Colombian emerald with no colour enhancement and minor clarity enhancement in an open back claw setting with an approximate weight of 1.70 carats, further set with two tapered baguette cut diamonds in open back rubover settings with a combined approximate weight of 0.24 carats, to a striking flanked solitaire design featuring split corner claws, a linear pierced gallery and geometric open backholing, flanked by trumpeting openwork shoulders flowing through to a solid D-shape shank. Tested yellow gold and platinum, circa 1950, accompanied by Gemmological Certification Services report #80255-45.