A single-row natural pearl necklace. Estimate £20,000 - 30,000 (€27,000 - 41,000). Photo: Bonhams.

The graduated row of 69 natural pearls, measuring from 3.6 to 8.4mm, with an oval-shaped sapphire and rose-cut diamond clasp, length 46.0cm

Accompanied by a report from The Gem & Pearl Laboratory stating that the pearls are natural, saltwater. Report number 10982, dated 18 March 2015.

Provenance: From a noble family

Bonhams. FINE JEWELLERY, 22 Apr 2015 14:00 BST - LONDON, NEW BOND STREET