A cushion-shaped diamond single-stone ring, by Chaumet

A cushion-shaped diamond single-stone ring, by Chaumet

The cushion-shaped diamond weighing 10.09 carats to the plain mount. Signed Chaumet Paris, No. 8180. Estimate £170,000 - £190,000 ($272,340 - $304,380)

Accompanied by report No. 08019423001 dated 26 August 2008 from the HRD Diamond High Council stating that the diamond is F colour, VS2 clarity.

Christie's. Jewellery. 10 June 2009. London, King Street www.christies.com