Lot 243. An impressive 52.76 carats, K color, VS2 clarity oval brilliant-cut diamond ring. Estimate $1,800,000 – $2,200,000. Photo Christie's Image Ltd 2016. 

Set with an oval brilliant-cut diamond, weighing approximately 52.76 carats, to the circular-cut diamond shoulders, ring size 6, mounted in platinum

Accompanied by report no. 5172543341 dated 22 March 2016 from the GIA Gemological Institute of America stating that the diamond is K color, VS2 clarity, with excellent polish and symmetry 

Christie's. MAGNIFICENT JEWELS & THE CULLINAN DREAM, 9 June 2016, New York, Rockefeller Plaza