A striking crystal opal and diamond dress ring. 18ct white gold, Art Deco styled as a large panel style ring, featuring centrally a large cabochon rectangular panel of solid crystal opal, measuring 28 x 9.8 mm, strong blacked spectral colours visible throughout, claw set in an open backed mount, flanked to each side by stepped grain set shoulders of single cut diamonds, tapering to a single diamond, then merging to a smooth band.