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Lot 1973. A rare 12.58 carats D colour, internally flawless clarity unmounted rectangular-cut diamond. Estimate HK$8,000,000 – HK$12,000,000 (US$1,000,000-1,500,000). Photo Christie's Image Ltd 2016.

The rectangular-cut diamond, weighing approximately 12.58 carats. 

Accompanied by report no. 14923378 dated 15 April 2016 from the Gemologial Institute of America stating that the diamond is D colour, internally flawless clarity, with excellent polish and symmetryalso with a working diagram indicating that the clarity of the diamond is improvable

Note no. 0608671 dated 22 August 2006 from the Gübelin GemLab stating that the diamond is classified as type IIa diamond

Christie's. HONG KONG MAGNIFICENT JEWELS, 31 May 2016, Convention Hall