Ceylon sapphire and diamond cluster ring, American, circa 1960.

Ceylon sapphire and diamond cluster ring. Set to centre with an octagonal emerald-cut natural no heat Ceylon sapphire in an open back claw setting with a weight of 12.38 carats, further set with twenty tapered baguette cut diamonds in open back rubover settings with a combined approximate weight of 2.75 carats, and decorated with forty-two round brilliant cut diamonds in open back grain settings with a combined weight of 0.65 carats. The total approximate diamond weight is 3.40 carats, to an impressive geometric cluster design featuring polished edges, a decoratively pierced gallery with triangular motifs and chenier detail, and fancy shape open backholing, leading to tapering asymmetric shoulders and flowing through to a solid D-shape shank. Tested platinum and iridium, American, circa 1960, accompanied by SSEF report #141237 and The Gem and Pearl Laboratory report #25069.