Colombian emerald and diamond cluster ring. Set to centre with an octagonal step cut natural Colombian emerald with minor clarity enhancement in an open back rubover setting with an approximate weight of 1.70 carats, further decorated with sixty two round mixed old cut diamonds in open back grain and cut-down settings with a combined approximate weight of 0.62 carats, to a geometric double row cluster design featuring millegrain edging, an intricately pierced gallery with scrolling motifs, and fancy shape open backholing, leading to raised shoulders and flowing through to a solid flat shank. Marked platinum, French, circa 1915, accompanied by a Gemmological Certification Services report #5782-918.
