Lot 326. A 11.40 carats D VVS1 IF Type IIA diamond ring. Estimate CHF 800,000 - CHF 1,000,000. Price realised CHF 1,145,000. © Christie's Image Ltd 2015 

Set with a rectangular-cut diamond, weighing approximately 11.40 carats, to the tapered baguette-cut diamond shoulders, ring size 3¼ with ring sizer, with French assay mark for platinum.

Accompanied by report no. 5171103197 dated 6 April 2015 from the GIA Gemological Institute of America stating that the diamond is D colour, VVS1 clarity, a working diagram indicating that the clarity of the diamond might be potentially Internally Flawless, and a Diamond Type Classification letter stating that the diamond is Type IIA 

Christie's. MAGNIFICENT JEWELS, 13 May 2015, Geneva.