within a square border of old single-cut diamonds, tapering fluted shoulders and reeded shank, pierced key pattern to the gallery, mounted in platinum, apparently unmarked, accompanied by AGL report no. CS61693 giving the Colombian origin opinion for the emerald and that it shows no evidence of clarity enhancement ('no oil')Cluster 1.1 x 1.1cm / 7/16 x 7/16''Weight: 4.5g
Late 18th / early 19th century pear shaped emerald and diamond cluster ring, c.1800, the Colombian emerald of step cut and elongated outline, open set and inverted within a heart shaped border of old cut diamonds,