A pearl, ruby, enamel and diamond swan brooch. Photo: Bonhams.

The body set with a natural freshwater pearl, with a seed pearl necklace and crown, the neck, head and feathers set with brilliant-cut diamonds, to a circular-cut ruby eye, black enamel beak and feet, diamonds approx. 0.95ct total, length 5.2cm. Estimate £3,000 - 4,000 (€3,600 - 4,800)

Accompanied by a report from the Gem & Pearl Laboratory stating that the principal pearl is natural, freshwater. Report number 09215, dated 12th January 2014.

Bonhams. JEWELLERY. 12 Feb 2014, London, Knightsbridge - www.bonhams.com