Colombian emerald and diamond coronet cluster ring. Set to centre with a hexagonal step cut natural Colombian emerald with minor clarity enhancement in an open back rubover setting with an approximate weight of 0.70 carats, encircled by a single row of sixteen round old cut diamonds in open back grain settings with an approximate combined weight of 0.40 carats, to an elegant hexagonal cluster featuring openwork details with millegrain edging, an ornately pierced gallery and intricate open backholing, leading to inwardly tapering raised shoulders with cheniers and flowing through to a solid D-shape shank. Tested platinum, numbered '39324', circa 1925, accompanied by Gemmological Certification Services report #81313-87.
