French Art Deco geometric diamond bombe cluster ring in platinum

French Art Deco geometric diamond bombe cluster ring in platinum. Centrally set with an estimated 1.60ct round Old European cut diamond in a square collet setting, flanked by two round Old European cut diamonds in tapered collet settings, set to top and bottom with six vertical rows of eighteen round eight cut diamonds in grain settings, further embellished with twelve round Old European cut diamonds in grain settings, to a bold cluster design with polished collets, negative spacing, low settings and integrated trumpeting shoulders which smooth to a solid shank. Hallmarked platinum, French.