Botswanas economy relies on diamonds. This is not good news for its economy. If US decides not to consume diamonds, then the economy comes tumbling down.

http://www.iss.co.za/Af/...s/Botswana/Economy.html
The diamond sector continues to be the mainstay of the economy - it accounts for about one-third of GDP, more than 45% of government revenue, and about 75% of export earnings. Botswana is now the world's leading diamond producer, producing 29% of the world's value in 1998. Sales in 2000 hit record figures of US$5.67bn. The expansion in diamond output, which is now at capacity, combined with the exploitation of copper-nickel deposits, has enabled Botswana to amass foreign exchange reserves equal to more than two years’ imports.