A pair of onyx and diamond earrings and a moonstone and diamond pendant necklace, the earrings

A pair of onyx and diamond earrings and a moonstone and diamond pendant necklace, the earrings composed of articulated concentric hoops of carved onyx and brilliant-cut diamonds, mounted in white gold, length 2.6cm, post fittings, stamped 18K; the pendant set with a pear-shaped moonstone, surmounted by a looped ribbon motif set with brilliant-cut diamonds, to a fine gold chain, pendant length 1.6cm, chain length 45cm, stamped 750