Natural pearl, ruby and diamond necklace. Photo Sotheby's.

Composed of a strand of natural pearls measuring from approximately 6.10 to 11.90mm, the clasp set with calibré-cut rubies and single-cut diamonds, length approximately 520mm, French assay and maker's marks. Estimation 135,000 — 225,000 CHF

Accompanied by SSEF report no. 73752, stating that the fifty-six pearls were found to be natural, saltwater.

Sotheby's. Magnificent Jewels and Noble Jewels. Genève, 13 mai 2014 - www.sothebys.com