An opal and diamond cluster ring, the oval cabochon white opal claw set within an Edwardian style navette-shaped surround of millegrain set brilliant-cut diamonds, with pierced detail and scrolled gallery, between diamond set shoulder, mounted in 18ct white gold, shank hallmarked for London and signed ‘Luke Stockley’, opal measures 20mm x 11.5mm, ring size L½. £2000-2500