18ct two tone gold, Argyle fancy blue diamond, Argyle fancy pink diamond and diamond necklace, composed of a line of pear-shaped plaques pave-set at intervals with Argyle fancy pink, Argyle fancy blue and near colourless brilliant-cut diamonds, the blue, pink and near colourless diamonds together weighing approximately 2.29 carats, 1.99 carats and 6.27 carats respectively, completed by a detachable box clasp, circumference approximately 440 mm, adjustable to 415 mm.