A ring set with an oval-shaped diamond and calibré-cut ruby and pavé-set diamond shoulders, by Fasano. Photo Christie's Image Ltd 2014

Set with an oval-shaped diamond, weighing approximately 5.25 carats, to the calibré-cut ruby and pavé-set diamond shoulders, mounted in gold, ring size 9½, in red leather Fasano case. Signed Fasano. Estimate CHF220,000 – CHF320,000 ($251,599 - $365,962)

Accompanied by report no. 5151834381 dated 8 January 2014 from the GIA Gemological Institute of America stating that the diamond is D colour, VVS2 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

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014, Geneva - http://www.christies.com/