Colombian emerald and diamond ring. Set centrally with a rectangular step cut natural Colombian emerald in an open back channel setting with an approximate weight of 0.65 carats, further set with two rectangular step cut natural Colombian emeralds in open back channel settings with a combined weight of 0.80 carats, interspersed with two rectangular baguette cut diamonds in open back channel settings with an approximate combined weight of 0.90 carats. The total approximate emerald weight is 1.45 carats, to a striking linear design featuring an intricately pierced gallery and fancy geometric open backholing, leading to broad integrated shoulders and flowing through to a solid D-shape shank. Marked 18 carat yellow gold, circa 1950, accompanied by Gem and Pearl lab report #22477
