An exceptional 21.75 carats Type IIa diamond ring, by Mitsuo Kaji. Estimate CHF8,500,000 – CHF10,500,000($9,234,715 - $11,407,590). Photo Christie's Image Ltd 2015.
Set with an Ashoka-cut diamond, weighing approximately 21.75 carats, to the fancy-cut diamond shoulders and pavé-set diamond hoop, mounted in platinum, ring size 7¼, in brown leather Kaji case With maker's mark for Mitsuo Kaji
Accompanied by report no. 11191064 dated 27 February 2015 from the GIA Gemological Institute of America stating that the diamond is D colour, Flawless clarity, and a Diamond Type Classification letter stating that the diamond is Type IIa, 'IG Ashoka' and 'GIA 11191064' laser inscribed on the girdle
Report no. 0302240 dated 7 December 2007 (duplicate of the original report dated 5 March 2003), from the Gübelin GemLab stating that the diamond is D colour, Flawless clarity, a Note stating that the diamond is Type IIa and an Appendix saying that 'The diamond of 21.75 carats possesses a purity of colour and degree of transparency which are particular to the finest of natural colour Type IIa diamonds.'
Christie's. MAGNIFICENT JEWELS, 13 May 2015, Geneva