Coltan

Coltan or tantalite (short for columbite–tantalites) is a valuable ore. It can be made into the elements niobium and titanium. Coltan is a mixture of two minerals, columbite and tantalite.

Tantalum from coltan is used to make tantalum capacitors which are used for mobile phones, personal computers, automotive electronics, and cameras. Coltan mining is widespread in the Democratic Republic of Congo.

 References 

Category:Oxide minerals
Category:Republic of the Congo