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LONDON Authentic Maliek Collins Jersey , Sept. 26 (Xinhua) -- One of London's top diamond companies announced Tuesday it bought the world's largest rough diamonds, a rare gem the size of a tennis ball. Media reports said the diamond has been sold for 53 million U.S. dollars.


Laurence Graff said following successful negotiation with the Lucara Diamond Corp, his company has acquired the world's most valuable rough diamond, the Lesedi La Rona, weighing a record-breaking 1,109 carats.


Graff's company said in a statement the deal was closed with a handshake after more than a year of negotiations.


The diamond was put up for auction last year, but failed to reach its reserve price.


A spokesperson at Graff said: "Discovered at the Lucara Karowe mine in north-central Botswana, the hypnotic Lesedi La Rona is the largest gem quality rough diamond discovered in over 100 years."