Debswana Diamond Company, a joint venture between the government of Botswana and De Beers, recently launched the Cut-8 expansion project at Jwaneng mine, the largest ever investment in Botswana.

FORBES: De Beers Diamond Sales Up 53 Percent

The would-be buyer was a consortium consisting of Anglo American, a mining firm, the Oppenheimer family of South Africa and Debswana, De Beers' joint venture with the government of Botswana.

ECONOMIST: Record breaking

For one thing, not everyone is expected to take up the offer: only 209 workers and spouses of Debswana's 6, 000 employees have done so even though the drugs have been available for more than a year.

ECONOMIST: Anglo American offers AIDS drugs to all its employees