A ruby and diamond ring. Photo Christie's Image Ltd 2013

Set with an oval-cut ruby, weighing approximately 11.08 carats, within a two-row circular-cut diamond surround, to the circular-cut diamond shoulders, mounted in platinum. Estimate $1,500,000 – $2,500,000

With report CS 53281 dated 31 January 2013 from the American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of the ruby would be classified as Classic Burma (Myanmar). Heat Enhancement: None

With report 13025051 dated 18 February 2013 from Gübelin Gem Lab stating that gemmological testing revealed characteristics consistent with those of rubies orginating from Burma (Myanmar). No indications of heating. Accompanied by a supplemental letter from Gübelin Gem Lab attesting to the rarity and prestige of the ruby 

Christie's. NEW YORK MAGNIFICENT JEWELS AND THE PRINCIE DIAMOND. 16 April 2013. New York, Rockefeller Plaza.