An emerald and diamond ring, circa 1950. Photo: Bonhams.

The step-cut emerald, weighing 6.27 carats, set in a mount of scrolling design, between shoulders set with step, brilliant and single-cut diamonds, ring size M½. Estimate £10,000 - 15,000 (€12,000 - 18,000)

Accompanied by a report from AnchorCert stating that the emerald is of Colombian origin, with minor evidence of clarity enhancement. Report number 20015131, dated 19 March 2014.

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