A late 18^th Century emerald and diamond cluster ring, the central square-cut emerald of deep green colour in a yellow-metal cut-down closed-back setting, surrounded by ten old-cut diamonds in white metal cut-down mounts, the cluster flanked each side by graduating scallop motifs highlighted with rose-cut diamond accents, leading to shoulders of looped design, to a yellow metal ring shank surface testing as 9ct, size L ½, in S.J.Phillips box, 4.5 grams.