French Art Deco diamond square geometric cluster ring

French Art Deco diamond square geometric cluster ring in platinum. Centrally set with an octagonal emerald-cut diamond in a tension setting, bordered by four rectangular baguette cut diamonds in tension settings, alternating with four round Old European cut diamonds in square collet settings, to a stylish square cluster design with neat claws, millegrain borders and decorated with an open gallery supported by cheniers, flanked by raised boardly trumpeting shoulders featuring etched engraved details, before tapering and smoothing to a solid shank. Estimated total diamond weight 1.55cts.