Vintage Colombian emerald and diamond ring. Set with a drop shape old cut natural Colombian emerald with no colour enhancement in an open back claw setting with an approximate weight of 2.39 carats, flanked by two tapered baguette cut diamonds in open back half rubover settings with a combined approximate weight of 0.60 carats, to a finely pierced collet with curving claws and fancy backholing, the slightly raised shoulders flow down to a solid D-shape shank. Tested yellow gold and platinum, English, circa 1950, accompanied by Gemmological Certification Services report #5775-2575.