A harlequin opal and diamond ring by Catanachs, platinum, manufactured and retailed by Catanachs, featuring a central harlequin opal of strong blocked colours, measuring 21 x 13.5 x 4.65 mm, bezel set, flanked by curved grain set rails of old cut diamonds in a stepped arrangement, sixteen stones totalling approximately 0.48ct, merging to a fine band with engraving detail to ring gallery