Jadeite and Diamond Necklace, Janesich, 1920s. Photo Sotheby's

Composed of a graduated row of jadeite beads with an open work plaque clasp set with single-cut and rose diamonds, length approximately 480mm, clasp signed Janesich and numbered, French assay and maker's marks. Estimate 3,000-5,000 GBP

Accompanied by a report from the Gem & Pearl Laboratory no. 08038, stating that samples of jadeite jade showed no evidence of treatment.

Sotheby's. Fine Jewels. London | 11 juil. 2013, 10:30 AM - www.sothebys.com