An exceptional diamond. Photo Christie's Image Ltd 2013

The cushion-shaped diamond weighing approximately 76.91 carats, in purple leather fitted case. Estimate CHF6,200,000 – CHF8,200,000

Accompanied by report no. 1152019133 dated 19 October 2012 from the GIA Gemological Institute of America stating that the diamond is F colour, VVS1 clarity

Christie's. MAGNIFICENT JEWELS. 15 May 2013. Geneva