Australian South Sea pearl and Argyle fancy pink diamond and diamond necklace, composed of 27 cultured pearls of silver pink hue, graduating from approximately 15.00 mm to 18.00 mm embellished at intervals with 642 Argyle natural fancy pink brilliant-cut diamonds in 18ct pink gold collets, the pink diamonds together weighing approximately 11.55 carats, completed by an 18ct white gold ball clasp pave-set with Argyle natural fancy pink brilliant-cut and near colourless diamonds, the pink and near colourless diamonds together weighing approximately 1.79 carats and 1.33 carats respectively, circumference 460 mm.