A rare 12.30 carats rectangular-cut fancy intense orangy-pink diamond ring. Photo: Christie's Images Ltd., 2010

Set with a rectangular-cut fancy intense orangy-pink diamond weighing 12.30 carats, to the tapered baguette-cut diamond shoulders, mounted in platinum and gold, size 6¼ - Estimate CHF1,300,000 - CHF1,500,000 ($1,336,690 - $1,542,335)

Accompanied by report no. 5111518513 dated 2 February 2010 from the GIA Gemological Institute of America stating that the diamond is Fancy Intense Orangy-Pink colour, SI1 clarity

Christie's. Jewels: The Geneva Sale, 17 November 2010. Geneva www.christies.com