Conflict-Mineral Risks Persist in DRC's Coltan Supply Chain Despite International Scrutiny

[SMM Flash] Conflict-mineral risks surrounding eastern Democratic Republic of Congo's (DRC) coltan supply chain remain significant despite increased international scrutiny and diplomatic efforts. Rubaya, a major coltan-producing area in North Kivu under AFC/M23 control, has become a key source of revenue for the armed group. Recent investigations indicate that coltan from the area continues to move through Rwanda before entering international supply chains, raising concerns over the effectiveness of existing mineral traceability and responsible-sourcing systems.

A June 2026 investigation found evidence that at least five of Rwanda's seven largest coltan exporters had purchased material originating from M23-controlled areas in the DRC. The material was reportedly sold onward to traders and smelters in China and Kazakhstan before entering downstream electronics supply chains. The findings reinforce earlier UN assessments that minerals from Rubaya can be mixed with legitimate Rwandan production, making their origin increasingly difficult to verify.

International pressure has intensified. The US Treasury sanctioned a Rwandan network in June over illicit mineral trading linked to M23, while DRC-Rwanda monitoring mechanisms under the Washington Accords continued in August. At the same time, DRC and AFC/M23 representatives have pursued a separate Doha peace process. For tantalum and coltan buyers, the developments highlight a growing need for stronger origin verification, independent audits and supply-chain controls as geopolitical risk increasingly becomes a factor in critical-mineral procurement.