Emerald and Diamond Cluster Ring

Fine mid 19th century Colombian emerald and diamond cluster ring set in gold with a cut down rub over setting for the diamonds, English circa 1850-60.  The emerald measures 8.13 x 7.97 mm and has a gemmological certificate from GCS stating ‘Colombia, Medium dark, strong, very strongly bluish green, indications of minor clarity enhancement’. Overall dimensions 19.1 x 19 mm.