Lot 425. A Magnificent 101.27 carats F colour VVS1 clarity Excellent polish Excellent symmetry Type IIa Diamond Tiara. Estimate CHF 4,500,000 - CHF 6,500,000 (USD 4,517,228 - USD 6,524,885). © Christie's Images Ltd 2017

Centering a modified shield-shaped diamond, weighing approximately 101.27 carats, to the diamond-set extending scrolls, inner diameter 11.0 cm, mounted in gold, in black leather case. 

Accompanied by report no. 10468562 dated 15 June 2017 from the Gemological Institute of America stating that the 101.27 carat diamond is F colour, VVS1 clarity, with excellent polish and excellent symmetry, and a Diamond Type Classification letter stating that the diamond has been determined to be Type IIa. 

Christie's. Magnificent Jewels, 14 November 2017, Geneva