Opal and diamond pendant necklace/brooch, the torque collar of foliate design set to the front with a line of variously-shaped opals above an open work surround between a brilliant-cut diamond set border suspending a detachable opal and diamond cluster pendant, the opals and diamonds together weighing approximately 11.24 carats and 5.50 carats respectively, mounted in 18ct white gold, pendant detachable, inner circumference approximately 360 mm