Lot 566. Natural pearl and diamond hat pin, late 19th century. Estimate 70,000 — 120,000 CHF. Lot sold 122,500 CHF. Photo Sotheby's 2012

Set with a semi-baroque natural pearl measuring approximately 12.50 x 12.60 x 22.40mm, highlighted with circular-cut and rose diamonds, length approximately 107mm, French assay and partial maker's marks. 

Accompanied by SSEF report no. 62921, stating that the pearl was found to be natural, saltwater.

Jewels from the collection of Princess Frances Alice Poniatowska (1901-1989), née Willing Lawrance.

Sotheby's. Magnificent Jewels Geneva | 14 Nov 2012