An elegant diamond ring, by Cusi. Photo Christie's Image Ltd 2013

Set with a rectangular-cut diamond, weighing approximately 12.49 carats, to the tapered baguette-cut diamond shoulders, mounted in platinum, ring size 6, in beige suede Cusi case. Signed Cusi. Estimate CHF480,000 – CHF660,000

Accompanied by report no. 5151222424 dated 23 January 2013 from the GIA Gemological Institute of America stating that the diamond is H colour, VVS1 clarity, and a working diagram indicating that the clarity of the diamond might be potentially Internally Flawless

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