A stylish onyx and black and white diamond cluster ring, 18ct white gold, made as a modern marquise shaped cluster dress ring, centrally set with a peaked polished piece of black onyx, measuring 17.5 x 11 mm, claw set to each end, framed by a spaced claw set frame of eight brilliant cut white diamonds totalling 0.40ct and twenty smaller black brilliant cuts, totalling approximately 0.40ct, pierced to gallery, finished on a smooth tapering band.