Colombian emerald and diamond marquise cluster ring. Set to centre with one rectangular step cut natural Colombian emerald with minor oil in an open back rubover setting with an approximate weight of 0.75 carats, flanked by one round old cut diamond in open back grain settings, two in total, with a combined weight of 0.30 carats, further set with twenty cushion shape old mine diamonds in open back grain settings, with an approximate combined weight of 1.60 carats, adorned further with one round rose cut diamond in an open back grain setting, two in total, with a combined weight of 0.04 carats. The total diamond weight is approximately 1.94 carats. To an elegant marquis shape cluster design featuring scalloped edges, an intricately pierced gallery and fancy open backholing, to raised shoulders that flow through to a solid D-shape shank. Tested yellow gold and platinum, circa 1905, accompanied by a certificate from The Gem & Pearl Laboratory #23285.
