Lot 131: A Natural Pearl and Diamond Ring, by Van Cleef & Arpels. Estimate £50,000 - £70,000. Courtesy Bonham's.

The natural pearl, measuring 12.5mm x 11.3mm, between brilliant, marquise-cut and pear-shaped diamond shoulders, diamonds approximately 3.50 carats total, signed VCA, numbered 19830, French marks, ring size K

Accompanied by a report from Danat stating that the pearl is natural, saltwater. Report number 108842, dated 4 April 2019.

Accompanied by a copy of a report from GCS stating that the pearl, weighing 11.63 carats, is natural, saltwater. Report number 5776-5862, dated 9 June 2016.

Bonham's. London Jewels, December 4, 2019 2:00 PM GMT