Mining in Congo DRC
Cobalt and Ethical Issues

The DRC's cobalt occurs as heterogenite, CoOOH, a secondary mineral that forms when deeper copper-cobalt sulfides oxidize and weather into soft surface layers. Grades run 5 to 15 percent around Kolwezi. People who grew up in mining families recognize it by sight against red laterite. They dig it with shovels. No other major producing country has cobalt deposits where hand extraction is commercially viable at scale. Australia's cobalt is locked in nickel laterite sulfides. Canada's Voisey's Bay deposits require underground industrial mining. The geological accessibility of Congolese heterogenite is the foundation of the entire ethical problem and also, uncomfortably, the foundation of the only cash income available to a large population in a region with almost no formal employment.

The Ministry of Mines estimates 150,000 to 200,000 artisanal miners. That number has not been rigorously updated since UNICEF-affiliated counts in 2018 and is probably low during price spikes.

At the pit mouth, négociants, the buyers, carry handheld XRF analyzers. These devices read cobalt content in seconds. They cost $30,000 to $50,000 new. The creuseur, the digger, does not have one. The entire first transaction in the global cobalt chain, the one where the person who crawled into a 30-meter unsupported tunnel gets paid, happens under total information asymmetry. BGR, Germany's geological institute, tested independent assay stations at artisanal sites in a 2019 feasibility study. Miners who could verify grades got better prices. The program ended. Nobody scaled it. The RMI does not include pit-side assaying in its framework. Apple does not mention it in its Supplier Responsibility reports. Hundreds of millions of dollars have flowed into downstream traceability, blockchain pilots, smelter audits. The amount spent on letting miners know what their ore is worth remains negligible.

It has been proposed by BGR and others for years. The négociant class opposes it because their margin depends on the information gap, and the international organizations funding traceability work have no direct incentive to intervene at this stage because their due diligence obligations begin further downstream. So a creuseur in 2026 negotiates under the same conditions as in 2010. LME cobalt has ranged between roughly $25,000 and $82,000 per metric ton over the past seven years (the $82,000 peak was March 2018, per LME data). The creuseur sees between 5 and 15 percent of the eventual refined metal value.

Heterogenite mined by hand gets acid-leached and precipitated into cobalt hydroxide, Co(OH)₂, at depots in Kolwezi, Likasi, and Lubumbashi, most of them Chinese-operated. The hydroxide ships to China for refining. Here is what makes this processing step so consequential for the traceability question. Cobalt hydroxide carries a different customs classification than cobalt ore. It is a chemical product, not a mineral. Dodd-Frank Section 1502, the OECD Due Diligence Guidance, and industry certification schemes were designed to track minerals. When heterogenite becomes hydroxide at a Kolwezi depot, the material steps from one regulatory category into another, and tracking systems built to follow ores lose it. Blockchain pilots tag bags of ore. The ore is dissolved in acid. The tag ceases to exist along with the bag. IBM and RCS Global launched a blockchain cobalt tracing project in 2018. By the most recent public reporting, it covers a limited number of industrial chains and does not follow material through third-party hydroxide conversion. No publicly documented traceability system maintains chain of custody from artisanal pit through hydroxide conversion into a specific refinery lot.

Between pit and finished product there are at least six transactional steps, and each one aggregates material from multiple sources. By the depot stage, individual batch origin is already gone. Amnesty International's "This is What We Die For" (January 2016, based on 87 interviews with miners including children as young as seven) traced the general flow from five Katanga sites and named Apple, Samsung, Microsoft among endpoint brands. The report established systemic complicity. No one has since demonstrated the ability to follow a specific batch from a specific tunnel into a specific device. The structure of the supply chain prevents it.

Glencore suspended its Mutanda mine in late 2019. Mutanda was producing about 25,000 metric tons of cobalt per year, roughly a fifth of global supply. LME prices had crashed. Partial restart came in 2022. Several thousand workers and contractors lost income. They went into artisanal mining because Haut-Katanga does not have other industries. The IISD documented increased ASM activity in the region after the closure.

The 2017-2018 price spike also pulled more children into mines, a dynamic that confuses people who assume child labor is solely a product of poverty. It is also a product of opportunity cost. When cobalt is at $80,000 a ton, six months of a child's labor can fund a concrete house. The return on a semester of school is zero over that timeframe. Families in Kolwezi calculated this with a precision that external observers tend to underestimate. When prices crashed, children stayed because household income need became more acute. There is no price level at which the commodity market alone resolves child labor.

Kasulo. A neighborhood in Kolwezi sitting on heterogenite. Residents discovered ore under their floors around 2014-2015 and started tunneling through their own houses. International media played it as surreal. What was not widely reported was the real estate market that developed around geological potential, property transactions restructured so that a house on rich ore was worth more as a mine than as a dwelling. Families traded plots based on assay data from neighboring excavations. Kasulo needed geological survey data made public, a regulatory framework for urban mineral extraction, and compensation for residents whose homes were undermined by neighboring digging. None of these materialized.

The Entreprise Générale du Cobalt, created in 2019 with Trafigura as international offtaker, was a state monopoly buyer designed to formalize artisanal cobalt. Chinese depots pay cash daily at the pit. EGC paid through banking channels with delays. For a miner with no savings needing to buy food that evening, the speed of payment overrides the price differential. EGC also operated from fixed buying stations while the négociant network reaches hundreds of dispersed sites. Trafigura was a puzzling partner given the company's $198 million settlement from the 2006 Probo Koala toxic waste incident in Côte d'Ivoire. By the early 2020s, EGC had captured a marginal share of artisanal cobalt.

A company running OECD-aligned due diligence can truthfully report no armed group involvement while the FARDC collects at every stage of the chain feeding into that company's supply.

Cash transfers. Pilots in Lualaba province, UNICEF-supported, set at roughly 60 to 70 percent of estimated child mining income. Families receiving them withdrew children from sites at rates exceeding every other intervention tested: school construction, vocational training, awareness campaigns, community monitoring. The mechanism is that children mine because households need income, so replacing the income addresses the cause. Schools are a necessary condition. They are not sufficient when the family cannot forgo the child's earnings.

Fewer than 30 refineries globally handle the bulk of cobalt processing. Huayou Cobalt, Jinchuan, GEM, CNGR in China. Umicore in Belgium. Sumitomo in Japan. Jervois in Finland. If the major consuming nations agreed to import controls at the refinery gate requiring verified origin documentation, the entire supply chain would pass through an auditable chokepoint. BGR has published on isotopic fingerprinting methods that can identify cobalt from specific formations. The analytical tools exist in peer-reviewed literature. Refinery-gate enforcement would raise cobalt prices, raise battery costs, slow EV adoption, and put pressure on decarbonization timelines. Energy and climate ministries across the G7 are measured on decarbonization progress, not on conditions in Katangan mines. The EU Battery Regulation mandates due diligence and recycled content from 2030, relying on corporate self-reporting. There are no border-level controls on cobalt hydroxide entering European ports.

LFP batteries have no cobalt. They crossed 40 percent of global EV battery installations by 2024 (Benchmark Mineral Intelligence data), up from under 20 in 2019. CATL and BYD built their positions on this chemistry. For premium vehicles competing on range, NCM and NCA cathodes at 250 to 300 Wh/kg still outperform LFP at around 160. The IEA's Global EV Outlook 2024 projects total cobalt demand rising through 2030 because battery production volumes are expanding faster than LFP substitution displaces cobalt.

Norway's Government Pension Fund Global exceeds $1.5 trillion, accumulated from petroleum revenue while oil demand was climbing. Botswana built universal education through diamond revenue captured via the Debswana joint venture while diamonds held premium prices. Both converted resource wealth into durable assets before their commodity's strategic window narrowed. The DRC's 2018 mining code raised cobalt royalties to 10 percent under a "strategic substance" designation, over industry opposition from Glencore and Ivanhoe among others. Collection is inconsistent. IPIS field surveys suggest that royalty redistribution to mining communities falls well short of what the code mandates. There are maybe 15 to 20 years in which cobalt generates enough demand for the DRC to build something lasting from it. Recycling extends this somewhat. Hydrometallurgical cobalt recovery exceeds 95 percent at pilot scale. Li-Cycle and Brunp Recycling are scaling commercial capacity. The EU mandates recycled content from 2030. EV batteries last 10 to 15 years. The production surge began around 2018-2020. Recyclable feedstock arrives in the 2030s. Until then, primary extraction covers demand growth, and the conditions of that extraction are the ones described in this article.