An impressive coloured diamond ring.  Photo Christie's Image Ltd 2013  

Set with a fancy deep brown-yellow cushion-shaped diamond, weighing approximately 35.28 carats, ring size 6, with French assay mark for gold. Estimate CHF950,000 – CHF1,150,000

Accompanied by report no. 5131101378 dated 27 May 2011 from the GIA Gemological Institute of America stating that the diamond is Fancy Deep Brown-Yellow colour, VS1 clarity, and a diamond type classification letter indicating that the diamond is Type IIa

Report no.11050108 dated 17 May 2011 from the Gübelin GemLab stating that the diamond is Fancy Yellowish-Brown colour, VVS2 clarity, a Note indicating that the diamond is Type IIa, and an Appendix stating that the diamond 'displays an antique shape and cutting style which were often encountered in the 17th and 18th centuries.'

Christie's. MAGNIFICENT JEWELS. 15 May 2013. Geneva