A natural pearl and diamond pendant. Photo: Bonhams.

The 7.0mm-10.0mm pearl, suspended from a duo of old brilliant-cut diamonds in millegrain collet-settings, to a platinum fine trace-link chain, maker's marks, pendant and chain with partial UK hallmarks, lengths: pendant 1.6cm, chain 44.0cm. Estimate £1,200 - 1,500 (€1,500 - 1,800)

Accompanied by a report from The Gem & Pearl Laboratory, stating that the pearl is natural, saltwater. Report number 08507, dated 7th September 2013.

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