Natural pearl and diamond jabot pin, early 20th century. Estimation 3,000 — 4,000 GBP. Photo Sotheby's.

Of scroll and foliate design, pierced and millegrain-set with cushion-shaped, circular- and single-cut diamonds and two natural pearls, French assay mark.  

Accompanied by CISGEM report no. 84867 stating that the pearls were found to be natural, saltwater. 

Sotheby's. Fine Jewels, Londres, 18 mars 2015, 10:30 AM