Emerald and Diamond Necklace, Boucheron, Circa 1930s. Estimate 2,500,000 — 3,200,000 HKD (281,645 - 360,506 EUR). Photo Sotheby's.

Designed as a supple openwork collar, set with numerous brilliant-cut diamonds together weighing approximately 40.00 carats, the centre highlighted by a briolette emerald weighing 65.33 carats, mounted in platinum, signed Boucheron Paris, length approximately 355mm, one tiny diamond deficient.

Accompanied by Gübelin report numbered 12067095, dated 25 June 2012, stating that the 65.33 carat emerald is natural, of Colombian origin, with indications of minor clarity enhancement

Sotheby's. Magnificent Jewels & Jadeite, Hong Kong, 06 avr. 2015, 01:00 PM