Lot 293. Natural Pearl and Diamond Necklace, Late 19th Century. Estimate 20,000 — 25,000 GBP. Lot sold 40,000 GBP. Photo Sotheby's

Composed of three graduated rows of natural pearls, measuring from approximately 5.00 to 8.45mm, the square clasp set with foil backed cushion-shaped and circular-cut diamonds, length of shortest row approximately 420mm. 

Accompanied by SSEF report no. 69924, stating that the pearls were found to be natural, saltwater.

Sotheby's. Fine Jewels. London | 26 Mar 2014, 10:00 AM