Congo is the world’s leading producer of coltan, from which tantalum is extracted. Tantalum is in hot demand because of its growing use in consumer products, from smartphones to laptops and it is critical for the defense industry (e.g., Apple iPhones, SpaceX rockets, IBM computers).

Coltan is mined in the country’s restive east, a region that has been engulfed in a decadeslong war between rebel groups and the Congolese army…A powerful militia backed by neighboring Rwanda has taken over swaths of eastern Congo, driving some two million people from their homes as fighters kill, torture and rape civilians. The militia, known as M23, has also seized control of Congo’s coltan production and transport, according to United Nations investigators, supply-chain experts, researchers and local traders. 

Now, a network of smuggling routes is increasingly being used to move ore illegally from militia-controlled mines in eastern Congo to neighboring Rwanda. From there, it is sold as Rwandan, and hence “conflict-free,” to smelters around the world, but primarily in China. 

M23 fighters levy taxes on informal coltan miners, who dig the ore from the ground, mostly by hand. The fighters also tax the movement of coltan, providing the militia with revenue to purchase weapons and other supplies. Overall, the trade generates around $300,000 a month for the fighters, according to Bintou Keita, the head of the U.N. mission in Congo….U.S. lawmakers have sought to prevent minerals commonly mined in eastern Congo—tin, tungsten, tantalum and gold—from financing conflict in the region. Legislation embedded in the 2010 Dodd-Frank Act requires U.S.-listed companies to disclose their use of the minerals, known as the 3TGs, as well as steps they are taking to prevent inadvertently financing armed groups. It doesn’t, however, oblige companies to remove potentially tainted materials from their supply chains…

Other armed groups are also profiting from the illegal coltan trade, including an alliance of militias that is helping the Congolese military fight M23, according to rights groups and U.N. researchers. The alliance, known as the Wazalendo, which U.N. investigators say is armed by Congo’s military, includes groups that are under international sanctions for war crimes. M23 and the Wazalendo are both recruiting child soldiers, raping women and girls, looting, murdering civilians and committing other atrocities, according to rights groups and U.N. investigators. Like M23, the Wazalendo are collecting illegal taxes on coltan at roadblocks along transportation routes, as well as from some mining sites. 

Excerpt from Alexandra Wexler, How This Conflict Mineral Gets Smuggled Into Everyday Tech,  WSJ, Oct. 6, 2024