Art Deco ruby and diamond eternity ring. Set with twelve square step cut natural unenhanced rubies in open back channel settings with a combined approximate weight of 0.70 carats, further set with twelve round old cut diamonds in open back grain settings with a combined approximate weight of 0.30 carats, to a smoothly conforming full eternity band with alternating sections, polished borders and intricately pierced square backholing, approximately 2.2mm in width. Tested platinum, circa 1920.
