Coltan is refined into tantalum, which is then used to manufacture smartphones and other electronic devices Kenya has discovered its first deposits of the valuable mineral coltan, the mining ...

News has it that a rare ore, columbite-tantalite (coltan), was discovered around the Kiritiri, the headquarters of the sub-county. Parts of this sub-county are incredibly rocky; no wonder colten ...

Rebels in eastern Democratic Republic of Congo fraudulently exported at least 150 metric tons of coltan to Rwanda last year, leading to the largest contamination of the Great Lakes Region's mineral ...