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A fancy-coloured diamond single-stone ring. Photo: Bonhams.

The heart-shaped diamond, weighing 11.19 carats, between colourless pear-shaped diamond shoulders, remaining diamonds approximately 0.60 carat total, ring size M½. Estimate £25,000 - 35,000 (€30,000 - 42,000)

Accompanied by a report from GIA stating that the diamond weighing 11.19 carats is Fancy Deep Brownish Greenish Yellow, natural colour. Report number 2151829027, dated 17 December 2013.

Bonhams. FINE JEWELLERY, 30 Apr 2014, London, New Bond Street - www.bonhams.com