An unmonted diamond. Photo Christie's Image Ltd 2013  

The pear-shaped diamond weighing approximately 10.21 carats. Estimate CHF860,000 – CHF1,150,000

Accompanied by report no. 5151255188 dated 12 February 2013 from the GIA Gemological Institute of America stating that the 10.21 carat diamond is D colour, Internally Flawless clarity, and a Diamond Type Classification letter stating that the diamond is Type IIa

Property of an American Private Collection

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