An emerald and diamond five-stone ring

An emerald and diamond five-stone ring, the central emerald-cut emerald weighing approximately 0.84cts, flanked by two old-cut diamonds and two emerald-cut emeralds in white and yellow gold, stamped 18ct, size O 1/2

A verbal report from GCS states that the central emerald shows indications of minor-moderate clarity enhancement, origin: Colombia