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A fine colored diamond necklace. Photo: Christie's Images Ltd 2010

Designed as a series of thirty graduated cut-cornered modified square and rectangular-cut fancy vivid yellow diamonds, weighing from approximately 5.03 to 0.64 carats, each spaced by marquise-cut diamond florettes, with a bezel-set circular-cut yellow diamond, mounted in 18k gold and platinum, 15½ ins. Estimate $800,000 - $1,200,000

With thirty reports dated from 18 September 2000 to 9 March 2009 from the Gemological Institute of America stating that the thirty diamonds are fancy vivid yellow, natural color, 26 of which range from internally flawless to SI1 clarity
Total weight of the thirty fancy vivid yellow diamonds is approximately 54.93 carats

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A colored diamond ring. Photo: Christie's Images Ltd 2010

Set with a cut-cornered rectangular-cut fancy intense yellow diamond, weighing approximately 17.28 carats, to the 18k gold hoop. Estimate $400,000 - $600,000

With report 1122134697 dated 7 May 2010 from the Gemological Institute of America stating that the diamond is fancy intense yellow, natural color, VVS2 clarity

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A colored diamond ring. Photo: Christie's Images Ltd 2010

Set with a modified cushion-cut fancy vivid yellow diamond, weighing approximately 3.66 carats, to the circular-cut yellow diamond hoop, mounted in 18k gold, ring size 6. Estimate $250,000 - $300,000

With report 2111711451 dated 29 April 2010 from the Gemological Institute of America stating that the diamond is fancy vivid yellow, natural color, SI1 clarity

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A colored diamond ring. Photo: Christie's Images Ltd 2010

Set with a modified cushion-cut fancy deep yellow diamond, weighing approximately 16.02 carats, within a circular-cut yellow diamond surround, to the 18k gold hoop Estimate $250,000 - $350,000

With report 2125384538 dated 14 July 2010 from the Gemological Institute of America stating that the diamond is fancy deep yellow, natural color, VS1 clarity

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A colored diamond pendant necklace. Photo: Christie's Images Ltd 2010

Suspending a detachable pear-shaped fancy yellow diamond, weighing approximately 8.36 carats, from a graduated series of pear-shaped diamonds, mounted in platinum and 18k gold, 14¾ ins. Estimate $200,000 - $250,000

With report 2125591497 dated 16 September 2010 from the Gemological Institute of America stating that the diamond is fancy yellow, natural color, VVS1 clarity

With twenty-one reports dating from 30 March 2005 to 12 May 2010 from the Gemological Institute of America stating that the diamonds range from H to K color, VVS2 to SI2 clarity

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A colored diamond ring. Photo: Christie's Images Ltd 2010

Set with a pear-shaped fancy brown-orange diamond, weighing approximately 8.69 carats, flanked on either side by a pear-shaped diamond, within a circular-cut brown diamond surround, to the circular-cut brown diamond hoop, mounted in 18k rose gold, ring size 6. Estimate $200,000 - $300,000

With report 2125195237 dated 1 June 2010 from the Gemological Institute of America stating that the diamond is fancy brown-orange, natural color, VVS1 clarity

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A colored diamond pendant necklace. Photo: Christie's Images Ltd 2010

Suspending a pear-shaped fancy brownish yellow diamond, weighing approximately 12.15 carats, from a circular-cut diamond link, to the fine link white gold chain, mounted in white gold, 15½ or 17 ins. Estimate $50,000 - $70,000

With report 17481111 dated 11 August 2008 from the Gemological Institute of America stating that the diamond is fancy brownish yellow, natural color, VVS2 clarity

Christie's, New York Jewels, 7 December 2010, New York, Rockefeller Plaza www.christies.com