Conflict minerals

What it is

Conflict minerals is the regulatory and supply-chain term for four raw materials whose extraction finances armed groups in fragile states. The canonical four, collectively called 3TG, are tin (from cassiterite ore), tantalum (from coltan), tungsten (from wolframite), and gold. All four appear in consumer electronics, electric-vehicle batteries, aerospace components, and weapons systems. The designation is geographic as much as geological: the same metals mined elsewhere carry no conflict label. The primary concern zone is the Democratic Republic of Congo and the nine countries that share its borders, where revenues from mine taxation and direct control by armed groups have fuelled successive civil wars since the 1990s. Key players in the supply chain include artisanal and semi-industrial miners, cross-border mineral traders, international smelters and refiners, and electronics original equipment manufacturers.

History

The term entered international policy through the late 1990s and early 2000s, when successive United Nations expert panels documented how control of mining revenues drove the DRC's wars. The United States codified a response in Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, requiring publicly listed companies to disclose whether 3TG in their products originated from the DRC or an adjoining country. The US Securities and Exchange Commission issued implementing rules in August 2012.

The European Union followed with Regulation EU 2017/821, which came into force on 1 January 2021. The EU law covers importers of 3TG ores, concentrates, and processed metals above defined volume thresholds, grounding its requirements in the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, third edition published in 2016. That five-step due-diligence framework became the shared international standard underpinning both regimes.

Current state

As of mid-2026, the regime faces its most visible test in years. The Rwandan-backed M23 movement controls the Rubaya mining district in eastern DRC, home to roughly 15% of global tantalum output. A June 2026 Global Witness investigation found that M23 taxes coltan at US$4/kg, generating approximately US$800,000 a month, and that the mineral is relabelled as Rwandan before export. That rebranding allows it to pass through the ITSCI conflict-free tagging scheme, which major smelters rely on to satisfy both Dodd-Frank and EU compliance. The investigation, documented in Global Witness traces M23 'conflict coltan' through Rwanda into Apple, Microsoft and Nvidia supply chains, named Microsoft, Apple, Sony, Amazon, and Nvidia among downstream buyers.

The EU Conflict Minerals Regulation contains volume-threshold exemptions that allow small importers to avoid due-diligence obligations, and independent auditors have noted that certifications are routinely applied at transit points rather than at mines, the precise vulnerability the Rubaya case exposes.

Relationships

The 3TG framework sits inside the broader critical-minerals competition. Tantalum and tin are on both the US and EU critical-minerals lists, and demand from AI server capacitors, EV batteries, and defence electronics is projected to grow through 2030, creating commercial incentives that pull against supply-chain scrutiny. Rwanda, which borders eastern DRC, is formally classified as a DRC-adjoining country under both US and EU rules, yet it functions as the main laundering transit point. The ITSCI and RMAP certification ecosystems are partly funded by the industry associations representing the smelters they audit, a structural conflict that critics say compromises independence. The broader DRC minerals picture, including the US-DRC minerals framework signed in 2026, is covered in コンゴ民主共和国、米・UAE支援の準軍事鉱山警備隊を創設、ワシントン合意によるM23撤退の工程表が始動, and the underlying DRC conflict trajectory in DR Congo / M23 Conflict.

What to watch

Four threads will determine whether the regime closes its gaps. Whether the EU's scheduled 2026 review of Regulation 2017/821 removes volume-threshold exemptions for small importers. Whether any named tech brands face EU or US enforcement action over the Rubaya supply-chain failure. Whether a DRC-Rwanda peace settlement removes M23 from the Rubaya mines and restores DRC state oversight. And whether the ITSCI tagging scheme shifts certification requirements to the mine head rather than the transit country.