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Edwardian Colombian emerald coronet cluster ring. Centrally set with one 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 1.10 carats, encircled with eight round old cut diamonds in open back claw settings with an approximate combined weight of 2.20 carats, to an elegant floral shaped coronet cluster, with pierced claws and ridged detail to the gallery, shaped backholing, flowing through to trumpeting shoulders and leading to a D-shaped shank. Marked yellow gold and platinum, French control marks, circa 1910, accompanied by Gemmological Certification Services report #79178-96.