Add Yahoo as a preferred source to see more of our stories on Google. Alain Libondo (17) left, and Nsinku Zihindula (25), hammering at solid rock to find cassiterite and coltan at Szibira, South Kivu.

Seizures of coltan in Colombia have shown the complex networks used by armed groups to smuggle the valuable mineral from illegal mines across the border in Venezuela. Prosecutors announced on August ...

The northeastern part of the country contains gold, coal and iron-ore deposits, and coltan – a term derived from the word ‘columbite-tantalite’ that belongs to a group of geochemical products ...

Amazon and Sony among firms that may have sourced coltan, used in phones, from supply chains controlled by the M23 rebels, says Global Witness Leading global brands including Amazon, Ericsson and Sony ...

The Democratic Republic of Congo (DRC) is rich in natural resources – its untapped deposits of minerals are estimated to be worth US$24 trillion. Gold, diamonds, cobalt and zinc are among them.