An emerald and diamond cluster brooch, circa 1860. Photo Bonhams
The octagonal step-cut emerald, within borders of old brilliant-cut and cushion-shaped diamonds, mounted in silver and gold, emerald approximately 6.50 carats, diamonds approximately 7.75 carats total, composite, length 3.5cm. Sold for £40,800 (€51,277)
Accompanied by a certificate from the Gem and Pearl Laboratory.