Which region of the Democratic Republic of Congo is the source of centuries' old copper exports?

Question

Near Lubumbashi (once named Élisabethville), third largest city of the Democratic Republic of Congo, the dark conical slag mountain which has been celebrated on a bank note was originally formed from nearly 70 years of mining for what?

Answer 1

Katanga
Copper has been mined and exported by the Katanga people for over a millennium, and the eastern part of the province is rich in other valued minerals, i.e. much of the world's cobalt as well as extensive quantities of tin, radium, uranium, and diamonds. The region has been fought over many times since the late 19th century colonial times.