It has been alleged that De Beers uses its monopoly to create an artificial scarcity of diamonds, thus keeping prices high.
De Beers distributes diamonds to favored customers (called site holders) by selecting batches of diamonds themselves and offering them as is. Following the distressing use of diamond revenues by African revolutionaries engaged in diamond smuggling (blood diamonds), De Beers now sells only diamonds mined from their own mines, most of which are in South Africa and Botswana. They are currently involved in a joint venture which is developing a diamond prospect in Canada.
History
De Beers was founded in 1888 by Cecil Rhodes. In the 20th century it became property of the Oppenheimers, a German-Jewish dynasty.