The largest and most valuable bright blue diamond was sold for $ 57.5 million at an auction in Hong Kong, organized by the Sotheby's auction house, CBS reported. 

The identity of the buyer is not reported. 

The largest and most valuable blue diamond is being auctioned in Hong Kong

De Beers' blue diamond, which is over 15 carats, was mined in 2021 at the Cullinan mine in the Republic of South Africa, one of the few sources in the world of extremely rare stones of this color.

Its initial estimate was $ 48 million.

He received the highest possible color diamond rating from the American Institute of Gemology, which has so far been given to less than 1 percent of blue diamonds.

The South African Cullinan mine is known for the discovery of the world's largest diamond.

The Cullinan stone is 3106 carats and was found in 1905, adds BTA. 

Diamond