Sotheby's sale of De Beers Blue Diamond in april. Valuation: $35M$.


De Beers Millennium Jewel 4


A rare blue diamond of 10.10 carats will be auctioned on April 5 in Hong Kong by Sotheby's.


The auction house said Friday that "De Beers Millennium Jewel 4" could from between 30 and 35 million.


This stone "flawless inside" is as Sotheby's biggest blue diamond oval ever auctioned.


Slightly larger than almond, it was part of a prestigious collection exhibited at the Millennium Dome in London for the transition to the year 2000.


"There are not more than a dozen of blue diamonds of color '' fancy vivid '' of more than 10 carats, said  Sotheby's.


These pieces are so rare that "when they reach the market, they raise over the world a very strong interest. "



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