Art Deco Diamond & Onyx Three Stone Ring in Platinum

Art Deco diamond and onyx three stone ring in platinum. Centrally set with an estimated 0.70ct round old European cut diamond in a square collet setting, flanked to either side with two round old European cut diamonds in square collet settings, to a geometric three stone, decorated to top and bottom with curved linear terminals set with rose cut diamonds and flanked to either side with carved onyx shoulders which smooth to a solid shank.