It is smaller than a nail, extremely rare and extremely valuable. An anonymous buyer paid a record sum for it at an auction 10,5 million Swiss francs (7 million euros). Gem, put up for auction in Geneva, comes from the famous Cullinan mine in South Africa. It weighs 7,03 carat and has not the slightest flaw. It is one of the few known blue diamonds in the world. The stone was placed on a platinum ring. Merchant, who put up a gigantic amount, he will be able to name the diamond now, who still has no name. – This is new, world record price for a blue diamond – says David Bennett of Sotheby's auction house. – For people, who want to buy something, what no one else has, or for someone, who wants to have something beautiful, the blue diamond is very hard to come by. So when does it appear on the market, you have to try – adds Bennett. Blue diamonds owe their unusual color to traces of boron. They are the least common among colored diamonds, right after the red ones.
