A 9.28 carats fancy vivid yellow oval brilliant-cut diamond and diamond ring. Estimate €570,000 – CHF860,000 ($574,161 - $866,277). Photo Christie's Image Ltd 2015

Set with a fancy vivid yellow oval brilliant-cut diamond, weighing approximately 9.28 carats, to the triangular-cut diamond shoulders, ring size 4¾, mounted in gold

Accompanied by report no. 6177170151 dated 21 May 2015 from the GIA Gemological Institute of America stating that the diamond is Fancy Vivid Yellow colour, VVS1 clarity 

Christie's. GENEVA MAGNIFICENT JEWELS, 10 November 2015, Geneva