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

Composed of three graduated rows of natural pearls measuring from approximately 3.75 to 8.40mm, the clasp set with an oval sapphire within a frame of brilliant-cut diamonds, length of shortest row approximately 530mm. Estimation 185,000 - 275,000 CHF

Accompanied by SSEF report no. 69989, stating that the two hundred and ninety pearls were found to be natural, saltwater.

Sotheby's. Magnificent Jewels. Geneva | 13 Nov 2013 -http://www.sothebys.com/