A diamond necklace, by Graff. Photo: Christie's Images Ltd., 2010

Set with a heart-shaped diamond weighing 6.63 carats, to the fine link chain, mounted in platinum, adjustable length up to 44.5 cm
Signed Graff, no. 3083 . Estimate CHF 300,000 - CHF 450,000 - Price Realized CHF 411,000

Accompanied by report no. 8691613 dated 17 August 2010 from the GIA Gemological Institute of America stating that the diamond is D colour, VVS1 clarity; accompanied by a working diagram indicating that the clarity of the diamond may be potentially Internally Flawless

A diamond ring, by Graff. Photo: Christie's Images Ltd., 2010

Set with an oval-shaped diamond weighing 5.16 carats, mounted in platinum, size 6¾. Signed Graff. Estimate CHF 180,000 - CHF 250,000 - Price Realized CHF 213,000

Accompanied by report no. 10173311 dated 17 August 2010 from the GIA Gemological Institute of America stating that the diamond is D colour, VVS2 clarity; accompanied by a working diagram stating the clarity of the diamond is improvable

A diamond eternity band, by Graff. Photo: Christie's Images Ltd., 2010

Set with sixteen rectangular-cut diamonds, weighing a total of 11.90 carats, mounted in platinum, size 5½. Estimate CHF 30,000 - CHF 40,000 - Price Realized CHF 60,000

Accompanied by Certificate of Quality no. GR7286 dated 18 December 1998 from Graff

A pair of ruby and diamond ear clips, by Graff. Photo: Christie's Images Ltd., 2010

Each designed as a pear-shaped ruby, in a pear-shaped, marquise and brilliant-cut diamond cluster, mounted in platinum and gold. Signed Graff, no. 3952. Estimate CHF 180,000 - CHF 250,000 - Price Realized CHF 213,000

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