18ct gold, opal and diamond necklace, Terminating on a collet-set oval boulder opal weighing approximately 9.20 carats partially framed by a line of brilliant-cut diamonds suspended from a foliate motif pave-set with brilliant-cut diamonds, the diamonds together weighing approximately 1.60 carats, completed by a curved baton link chain, gross weight approximately 29.00 grams, circumference approximately 400 mm, retailed by C.A. Bochert. Accompanied by a C. A. Bochert box.