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GABORONE, BOTSWANA - MARCH 18: Nicky Oppenheimer, age 63, the Chairman of De Beers stands in a De Beers boardroom on March 18, 2008 in Gaborone, Botswana. It was Nicky?s grandfather, Sir Ernest Oppenheimer who launched what was the worlds largest diamond company about 120 years ago. Mr. Oppenheimer is a billionaire and his net worth was about USD 6 billion in 2005. He divides his time between Johannesburg and London. (Photo by Per-Anders Pettersson/Reportage by Getty Images)

GABORONE, BOTSWANA - MARCH 18: Nicky Oppenheimer, age 63, the Chairman of De Beers stands in a De Beers boardroom on March 18, 2008 in Gaborone, Botswana. It was Nicky?s grandfather, Sir Ernest Oppenheimer who launched what was the worlds largest diamond company about 120 years ago. Mr. Oppenheimer is a billionaire and his net worth was about USD 6 billion in 2005. He divides his time between Johannesburg and London. (Photo by Per-Anders Pettersson/Reportage by Getty Images)