24ct stone could be internally flawless after repolishing.
Sotheby’s has announced that it is preparing to sell what it calls “one of the most important and beautiful gemstones ever to come up for auction”.
At a sale in Geneva, Sotheby’s will present a rare emerald-cut 24.78ct fancy intense pink diamond that once belonged to Harry Winston. The diamond, which has been set into a ring, is a member of the rare and coveted type IIa classification that applies to less than 2 percent of all of the world’s gem diamonds. The Gemmological Institute of America has graded the stone and found it to be VVS2 clarity, and said that the stone may well be internally flawless after repolishing.
David Bennett, chairman of Sotheby’s international jewellery department in Europe and the Middle East, said: "During my 35-year career at Sotheby’s I have had the opportunity to examine many magnificent and rare gemstones and, put simply, this stone is one of the most desirable diamonds I have ever seen. What makes it so immensely rare is the combination of its exceptional colour and purity with the classic emerald-cut; a style of cutting normally associated with white diamonds and one that is so highly sought-after when found in rare colours such as pink and blue. The stone’s character is further enhanced by the gently rounded corners which impart a unique softness and charm to this truly outstanding gemstone.”
Sotheby’s has given the pink diamond a pre-sale estimate of CHF27 million to CHF38 million (£17.5 million to £24.7 million). Its appearance at auction, courtesy of a private collection, will be the first time the stone has been on the open market since it was purchased 60 years ago from renowned jeweller Harry Winston.
The diamond will be shown at exhibitions in Hong Kong, the Middle East, London, New York and Geneva in the weeks leading up to the sale, which will take place in Geneva on November 16.