An 18ct gold and diamond ‘Trinity’ pendant by Cartier, of tricoloured interlocking design, all inset with brilliant-cut diamonds, stamped ‘Cartier 750 © BGQ198’, European convention mark, on black cordette necklace with gold slider clasp, the clasp fully marked, cased, hoop diameter 24mm, necklace length 64cm. £2,600-£3,000