A collection of ten unmounted fancy coloured diamonds. Estimate £20,000 - 30,000 (€27,000 - 41,000). Photo Bonhams.

1st: Accompanied by a report from HRD stating that the pear-shaped diamond, weighing 1.06 carats, is Fancy Intense Brownish Orange colour. Report number 20020740902, dated 13th November 2002. 

2nd: Accompanied by a report from HRD stating that the pear-shaped diamond, weighing 0.92 carat, is Fancy Intense Brownish Orange colour. Report number 20020740906, dated 13th November 2002.

3rd: Accompanied by a report from the GIA stating that the cut-cornered rectangular modified brilliant diamond, weighing 0.42 carat, is Fancy Intense Pink colour. Report number 12729280, dated 30th June 2003.

4th: Accompanied by a report from the GIA stating that the cut-cornered square modified brilliant diamond, weighing 0.42 carat, is Fancy Intense Purplish Pink colour. Report number 13341768, dated 15th April 2004.

5th: Accompanied by a report from the GIA stating that the emerald-cut diamond, weighing 0.39 carat, is Fancy Deep Pink colour. Report number 13275811, dated 16th March 2004.

6th: Accompanied by a report from the GIA stating that the cut-cornered square mixed cut diamond, weighing 0.42 carat, is Fancy Vivid Purplish Pink colour. Report number 16812700, dated 29th January 2008.

7th: Accompanied by a report from the GIA stating that the oval modified brilliant diamond, weighing 1.98 carats, is Fancy Deep Greyish Yellowish Green colour. Report number 14602900, dated 12th October 2005.

8th: Accompanied by a report from the GIA stating that the round-cornered rectangular modified brilliant diamond, weighing 0.37 carat, is Fancy Dark Brown Purple colour. Report number 16914821, dated 24th March 2008.

9th: Accompanied by a report from the GIA stating that the cut-cornered square modified brilliant diamond, weighing 0.76 carat, is Fancy Greyish Yellowish Green colour. Report number 14287302, dated 27th March 2006.

10th: Accompanied by a report from the GIA stating that the cushion modified brilliant diamond, weighing 1.33 carats, is Fancy Vivid Yellow colour, internally flawless clarity. Report number 16193755, dated 1st October 2007. (10)

Bonhams. JEWELLERY, 13 May 2015 11:00 BST - LONDON, KNIGHTSBRIDGE