Lot 415. Important natural pearl and diamond necklace. Estimate 560,000 — 840,000 CHF. Lot sold 674,500 CHF. Photo: Sotheby's 2012

The graduated seven-strand necklace composed of natural pearls measuring from approximately 3.3 to 9.5mm, set to a clasp in the form of a double clip brooch set with circular-, single-cut and baguette diamonds, length approximately 660mm. 

Accompanied by SSEF report no. 63658, stating that the nine-hundred and six pearls were found to be natural, saltwater.