Two gem-set necklace clasps, a French cultured pearl and diamond-set clasp, the oval clasp with scroll motif set with graduated old circular-cut diamonds in platinum and white gold, French control marks and rubbed maker's lozenge, 2.8 x 1.5cm wide, 6.5g, and a rectangular clasp centred with pear-shaped diamond, within a folaite motif surround set with old circular-cut diamonds and rubies in silver and white gold, 1.6 x 1.4cm, 6g