A precious opal dress ring in 9ct gold, featuring an elongated precious opal panel with greyish-blue ground, displaying spectral play-of-colours optical effect, approximately measures 13.6 x 8.5 mm, mounted in collet setting, flanked by fleur-de-lis shoulders to ridged shank, Sheffield hallmarked '375' with maker's mark 'EFLtd', 1990, size M (damaged shank), total weight of item 2.9 grams.