Congo produced about 40% of the world’s coltan in 2023, according to the U.S. Geological Survey, with Australia, Canada and Brazil being other major suppliers.

Congo's coltan miners dig for world's tech — and struggle regardless of who is in charge Miners work at the D4 Gakombe coltan quarry in Rubaya, Democratic Republic of Congo, on Friday, May 9, 2025.

Congo’s coltan miners dig for world’s tech — and struggle regardless of who is in charge Miners work at the D4 Gakombe coltan quarry in Rubaya, Congo, earlier this month.

Congo's coltan miners dig for world's tech — and struggle regardless of who is in charge Nestled in the green hills of Masisi territory in Congo, the artisanal Rubaya mining site hums with the ...

Congo produced about 40% of the world’s coltan in 2023, according to the U.S. Geological Survey, with Australia, Canada and Brazil being other major suppliers.

Congo produced about 40% of the world’s coltan in 2023, according to the U.S. Geological Survey, with Australia, Canada and Brazil being other major suppliers.

Congo produced about 40% of the world’s coltan in 2023, according to the U.S. Geological Survey, with Australia, Canada and Brazil being other major suppliers.

Congo produced about 40% of the world’s coltan in 2023, according to the U.S. Geological Survey, with Australia, Canada and Brazil being other major suppliers.

Nestled in the green hills of Masisi territory in Congo, the artisanal Rubaya mining site hums with the sound of generators, as hundreds of men labor by hand to extract coltan, a key mineral ...