Very fine natural pearl and diamond necklace. Estimate 295,000 — 490,000 CHF. Photo: Sotheby's.

Composed of a graduated row of natural pearls measuring from approximately 7.95 to 12.40mm, on a barrel clasp set with brilliant-cut diamonds, length approximately 515mm, clasp signed V.C.A., numbered, French assay mark.

Accompanied by SSEF report no. 79533, stating that the fifty pearls were found to be natural, saltwater; together with an appendix letter. 

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 12 mai 2015, 10:30 AM