Natural pearl and diamond tiara-aigrette, late 19th century. Photo Sotheby's

Centring on an aigrette of foliate scroll design, set with circular-cut and rose diamonds, accented with three pearls, to an inverted scroll tiara surmounted with eight five-pointed stars, inner circumference approximately 220mm, fitted case stamped Guillot. Estimation 12,000 — 18,000 GBP 

Accompanied by The Gem & Pearl Laboratory report no.08852, stating that the pearls were found to be natural, saltwater.

Sotheby's. Fine Jewels. London | 12 déc. 2013. www.sothebys.com