Diacore performs the processing of exceptional diamonds, such as the Pink Star of 59.60 carats internally flawless, whose come back at auction is expected after a default by its purchaser. It had been auctioned at CHF 76M including premium on November 13, 2013 at Sotheby's, corresponding to US $ 1.4 million including premium per carat.
Internally flawless pink diamonds are extremely rare, which further increases the uniqueness of the Pink Star.
Another diamond of similar quality, smaller but in a more delicate shade, is for sale at Sotheby's in Hong Kong on October 7, lot 1941. Its history is similar to the Pink Star's : extracted by De Beers and processed by Diacore. It is mounted on a pavé-set platinum ring signed by Sotheby's Diamonds.
This fancy vivid purple-pink internally flawless pear-shaped diamond weighing 8.41 carats is exceptional both for its clarity and for its rich color saturation. It is estimated HK $ 100 million, corresponding to US $ 1,53M per carat excluding fees.
Remind that the Vivid Pink, a 5.00 carat fancy vivid pink VS1 sold for HK$ 83M including premium on December 1, 2009 by Christie's had then recorded US $ 2.1 million including premium per carat.