A crystal opal, ruby and diamond dress ring, 18ct white gold, made as a fancy rectangular cluster ring of Art Deco style, featuring a central a central oval cabochon crystal opal of approximately 1.15ct, strong orange and green spectral colours throughout, bezel set in an open backed mount, framed by calibre cut rubies, further framed by small grain set diamonds, further detailed by fine rails of diamonds reaching from outer rail to opal, completed on diamond set band.