A Fine Antique Sapphire and Diamond Brooch. Photo Christie's Image Ltd 2012

Set with an octagonal-cut sapphire, weighing approximately 60.44 carats, to the old-cut diamond surround, late 19th Century, 4.0 cm. Estimate CHF360,000 - CHF480,000

Accompanied by report no. 64492 dated 15 August 2012 from the SSEF Swiss Gemmological Institute stating that the sapphire is of Ceylon origin, with no indications of heating 

Christie's. Geneva Magnificent Jewels, 13 November 2012, Geneva