An emerald and diamond dress ring. Photo: Bonhams.

The step-cut emerald, weighing 4.08 carats, within a surround of brilliant and marquise-cut diamonds, diamonds approximately 1.50 carats total, ring size I½. Estimate £8,000 - 10,000 (€9,700 - 12,000)

Accompanied by a report from The Gem & Pearl Laboratory stating that the emerald is of Colombian origin, with evidence of moderate clarity enhancement. Report number 09589, dated 18 March 2014.

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