Cartier diamond ring. Set with twelve round brilliant cut diamonds in open back grain settings with a combined approximate weight of 0.36 carats, to a sculptural penannular ring featuring polished borders, a smooth gallery and open backholing, leading to smooth conforming shoulders and flowing through to a solid flat shank. Marked 18 carat yellow gold, numbered '84752', maker's mark 'JC', signed 'Cartier, full hallmarks for London, English, 1976.