A group of five gold and gem-set rings and a cultured pearl necklace

A group of five gold and gem-set rings and a cultured pearl necklace, comprising: an opal and seed pearl ring, size M; a foliate sapphire and diamond ring, size L1/2; a blue topaz ring, size N; a three-stone diamond ring, size K1/2, British hallmark for 18ct gold; a plain wedding band, size K1/2, British hallmark for 18ct gold; and a cultured pearl necklace, length 37.5cm, indistinct British hallmark, maker's mark for Cropp & Farr