A colored diamond ring. Photo Christie's Image Ltd 2007

Set with a cushion-cut fancy deep grayish blue diamond, weighing approximately 9.39 carats, within a pavé-set pink diamond surround and half-hoop, mounted in 18k rose gold. Price Realized $2,392,000

With report 14730902 dated 28 September 2006 from the Gemological Institute of America stating that the diamond is fancy deep grayish blue, natural color, VS2 clarity

Christie's. MAGNIFICENT JEWELS, 25 April 2007, New York, Rockefeller Plaza - www.christies.com