A diamond ring, by Cartier. Photo Christie's Image Ltd 2014.

Set with a cut-cornered rectangular-cut diamond, weighing approximately 10.38 carats, to the graduated baguette-cut diamond line shoulders, mounted in platinum, ring size 4 with sizing beads, in red leather Cartier case. Signed Cartier, no. HLS02897. Estimate CHF900,000 – CHF1,350,000 ($1,023,781 - $1,535,671)

Accompanied by report no. 8592554 dated 20 February 2014 from the GIA Gemological Institute of America stating that the diamond is D colour, VS1 clarity, a working diagram indicating that the clarity of the diamond is potentially Internally Flawless, and a Diamond Type Classification letter stating that the diamond is Type IIA

Also with a certificate from Cartier indicating the date of purchase (12 July 1999) and an Insurance Value letter from Cartier, dated 10 October 2013

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014. Geneva - www.christies.com