An exquisite pierced openwork Art Deco cabochon Columbian emerald and diamond ring set in platinum. With a centrally set cabochon Columbian emerald set between two parallel lines of calibre cut channel set emeralds, split by eight cut diamonds channel and grain set to the shoulders. Outside the two lines of emeralds are panels of platinum pave set with transitional round brilliant cut diamonds. Estimated Columbian cabochon emerald weight: 1.12cts. Estimated total remaining emerald weight: 0.46cts. Estimated total diamond weight: 0.34cts. Assessed diamond colour: G. Assessed diamond clarity: VS.