Art Nouveau Colombian emerald cameo ring. Set with an oval cabochon natural Colombian emerald cameo with no colour enhancement, intricately carved in relief to depict a bust of a young lady with long hair, in an open back rubover setting,with an approximate weight of 4.00 carats, bordered by twenty six round rose cut diamonds in open back grain settings with a combined approximate weight of 0.30 carats, to an elegant cluster design with an intricately pierced gallery, scalloped edging and open back holing, flowing through to trumpeting grooved shoulders continuing to a solid tapering shank. Marked 18 yellow gold, French, circa 1890, accompanied by Gemmological Certification Services report #79196-63.
