Art Deco Sterling Silver Ring set with Chrysophase and Marcasite

Art Deco Sterling Silver Ring set with a large rectangular Chrysophase surrounded with large German Marcasites over faceted Ring Faces. No Hallmark visible but tests as European 925 Silver. The ring frame is heavy with the Marcasite and the band is finer with a stepped shoulder each side. The ring shows age and makes a statement Dimensions approx.: Ring Size “H” or  “3 ¾” . Front outer silver frame 2cm x 1.3cm and stands 5.5mm above finger level; Band width and thickness is generally 1mm, to 2mm wide at “arrow” shoulders.  Europe. Circa 1940.