An important diamond brooch. Estimate $1,400,000 – $1,800,000. Photo Christie's Image Ltd 2015

Designed as a cluster of thirteen pear and marquise brilliant-cut diamonds, weighing approximately 2.07 to 5.03 carats, 2 1/2 ins., mounted in platinum. Mounting signed Cartier

Accompanied by report no. 11744459 dated 24 October 2001 from the GIA Gem Trade Laboratory stating that the marquise brilliant-cut diamond, weighing approximately 3.24 carats, is D color, Internally Flawless clarity 

With report no. 11761361 dated 12 November 2001 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 3.31 carats, is D color, Internally Flawless clarity 

With report no. 11741378 dated 11 October 2001 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 3.23 carats, is D color, Internally Flawless clarity 

With report no. 11638568 dated 23 July 2001 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 2.21 carats, is E color, VVS2 clarity 

With report no. 11494199 dated 27 March 2001 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 3.01 carats, is D color, VVS1 clarity 

With report no. 11476028 dated 23 March 2001 from the GIA Gem Trade Laboratory stating that the marquise brilliant-cut diamond, weighing approximately 5.03 carats, is D color, Internally Flawless clarity 

With report no. 11456080 dated 6 March 2001 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 2.07 carats, is D color, Internally Flawless clarity 

With report no. 11013878 dated 14 February 2000 from the GIA Gem Trade Laboratory stating that the marquise brilliant-cut diamond, weighing approximately 2.64 carats, is D color, Internally Flawless clarity 

With report no. 11112556 dated 12 June 2000 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 2.38 carats, is D color, Internally Flawless clarity 

With report no. 11013859 dated 12 January 2000 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 3.05 carats, is D color, Internally Flawless clarity 

With report no. 10486966 dated 6 November 1998 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 4.35 carats, is D color, Internally Flawless clarity 

With report no. 10324842 dated 16 March 1998 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 3.55 carats, is E color, VS1 clarity

With report no. 11386067 dated 19 December 2000 from the GIA Gem Trade Laboratory stating that the pear brilliant-cut diamond, weighing approximately 4.28 carats, is D color, Internally Flawless clarity 

Please note that the reports are more than 5 years old and may require an update.

Christie's. IMPORTANT JEWELS, 20 October 2015, New York, Rockefeller Plaza