Named the Peace Diamond the 709 carat rough diamond is the 14th largest ever recovered.
The rough diamond has sold for $6.5 million at an auction in New York, with all proceeds going to the impoverished Sierra Leone diggers who discovered it.
Sierra Leone will now be watched closely to make sure they see the social benefits from the sale of the diamond as the government promised.
The buyer of the Rough Diamond is Laurence Graff. One of the world’s top jewellers and founder of Graff Diamonds.