Natural pearl and diamond hat pin, late 19th century - Photo Sotheby's

Set with a drop-shaped natural pearl measuring approximately 11.30 x 12.05 x 17.50mm, highlighted with circular-cut and rose diamonds, length approximately 105mm, French assay and partial maker's marks. Estimation: 100,000 - 200,000 CHF - Lot. Vendu 140,500 CHF

Accompanied by SSEF report no. 62973, 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. Genève | 14 nov. 2012 www.sothebys.com