CNN's Market Place Africa analyzes the minerals and gems that come out of African countries and power our cars, electronics, jewelry, batteries, and airplanes. Click on one of the products like batteries, and you'll see a graphic like the one below which shows that 58% of the world's cobalt comes from Africa. The Democratic Republic of Congo produces the most, 48%. But other players include Zimbabwe, Botswana, and South Africa. This is very cool site and my thanks to the Virginia Geographic (@VAGeogAlliance) for tweeting the link.