An important natural pearl and diamond necklace. Photo Christie's Image Ltd 2014

The five strands composed of eighty-seven, eighty-one, seventy-six, seventy-one and sixty-five natural pearls, measuring approximately 12.5 to 4.5 mm, to the old-cut diamond-set bar clasp, mounted in silver and gold, shortest strand 52.0 cm. Estimate CHF1,800,000 – CHF2,700,000 ($2,058,537 - $3,087,805)

Accompanied by report no. 71661 dated 13 November 2013 from the SSEF Swiss Gemmological Institute stating that the 380 pearls are natural saltwater pearls, and an Appendix Letter mentionning the exceptional quality of these pearls