An impressive Emerald and Diamond Sarpech. Photo: Christie's Images Ltd., 2010

Set with six diamonds weighing 15.60, 15.08, 14.37, 8.90, 8.48 and 7.87 carats, alternating with rectangular-cut emeralds, to the scrolling openwork diamond-set frame, two central stones deficient, early 20th Century, 11.4 cm - Estimate CHF1,000,000 - CHF1,500,000 ($1,028,223 - $1,542,335)

Accompanied by reports nos. 2125476265, 2125476261 and 2125476262 all dated 17 August 2010 from the GIA Gemological Institute of America respectively stating that the 15.60, 15.08 and 14.37 carats diamonds are all I colour, VS2 clarity

Christie's. Jewels: The Geneva Sale, 17 November 2010. Geneva www.christies.com