Natural pearl, seed pearl and diamond brooch, Lacloche frères, circa 1910. Photo Sotheby's.

Suspending a drop-shaped natural pearl measuring approximately 9.30 x 9.55 x 14.80mm, from a chain of single-cut diamonds, the bar element set with circular-cut diamonds and seed pearl terminals, signed Lacloche Frères, numbered, French assay and partial maker's marks. Estimation 17,500 — 22,000 CHF

Accompanied by SSEF report no. 73561, stating that the pearl was found to be natural, saltwater.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève | 13 mai 2014 - http://www.sothebys.com/