A diamond ‘Talisman' necklace by De Beers, the circular plaque set with a rough diamond crystal, the starburst surround with textured detailing and inlaid with brilliant-cut diamonds of various tints, suspended from a cable-link chain, signed ‘De Beers’, pendant and chain with maker’s mark and Sheffield hallmark, numbered ‘A94083’, chain length 51cm, pendant length 48mm. £3,000-£5,000