18ct gold, diamond and opal necklace, circa 1991, centring a textured bezel set with a boulder opal weighing approximately 16.00 carats applied with a map of Australia pave-set with circular-cut diamonds framed by an open work foliate surround decorated at intervals with lines of brilliant-cut diamonds terminating in a pear-shaped diamond, the diamonds together weighing approximately 1.80 carats, completed by a cobra link chain, gross weight approximately 34.10 grams, circumference approximately 500 mm, retailed by C.A. Bochert. Accompanied by C. A. Bochert papers and box.