Art Deco cabochon Colombian emerald and diamond ring. Set with a cushion shape sugar loaf cabochon natural Colombian emerald in an open back rubover setting with an approximate weight of 1.30 carats, flanked by four tapering round old cut diamonds in open back grain settings with a combined approximate weight of 0.80 carats, to a geometric solitaire design with open backholing and trumpeting shoulders which lead through to a keeled shank. Marked platinum, French, circa 1930, accompanied by Gemmological Certification Services report #79197-22.
