A single-row pearl necklace with gem-set clasp. Photo: Bonhams.

The row of eighty-seven natural pearls and two cultured pearls, measuring from 1.9mm to 7.0mm, with a pierced lozenge clasp set with a circular-cut emerald and rose-cut diamonds, length 45.0cm. Estimate £8,000 - 10,000 (€9,700 - 12,000)

Accompanied by a report from The Gem & Pearl Laboratory stating that the pearls are natural, saltwater except for two which are cultured. Report number 09533, dated 7 March 2014.

The necklace has been re-strung since certification and the smallest natural seed pearl taken out due to damage. The two cultured pearls number 6 and 10 from the clasp.

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