An emerald and diamond dress ring. Photo: Bonhams.

Set with a large cabochon emerald between triangular-cut diamond shoulders, emerald approximately 27.00 carats, diamonds approximately 0.70 carat total, ring size N. Estimate £12,000 - 15,000 (€15,000 - 18,000)

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