Finger ring of 18 carat gold with pink tourmaline and diamonds, hallmarked: English, Buckingham, by Frances Beck, 1969

Bracelet of silver set with turquoises, tourmalines, aquamarines and a cultured pearl: English, London, by Gerda Flöckinger, 1968

Large, signed finger ring of gold and tourmaline with a large cabochon stone: British, by Rod Edwards, Australian, c. 1970

Bracelet of 18ct Gold with Tourmaline: English, London, designed by Andrew Grima for Hooper Bolton, 1963

Ring of 18ct Gold with Tourmaline: English, London, designed by Andrew Grima for Hooper Bolton, 1963

Neckpiece from 'The Laser Series', acrylic, silver, 18ct gold, step cut tourmaline, Roger Morris, Cupar, Fife, Scotland, 2014