Critical Minerals
The energy transition runs on a small group of metals — lithium, cobalt, nickel, copper, the rare earths — whose production is concentrated in a handful of countries, and whose refining is concentrated in even fewer. Most policy worry about “mineral security” is really about the refining stage, not the mine.
Last reviewed on 2026-04-27.
What makes a mineral “critical”
Two-axis criticality
Most government criticality lists — the EU’s, the United States’, Japan’s, the United Kingdom’s, Australia’s — score minerals on two axes: economic importance to the assessing country, and supply-risk concentration. A mineral that is essential for batteries, magnets, semiconductors, or defence applications scores high on the first axis. A mineral whose mining or refining is dominated by a single supplier scores high on the second. Criticality is country-specific; a mineral that is critical to one economy may not be to another.
The energy-transition basket
Across most lists, a recognizable basket emerges: lithium and cobalt for batteries; nickel for stainless steel and battery cathodes; copper for wiring and grid expansion; the rare earths (especially neodymium and praseodymium) for permanent magnets in wind turbines and EV motors; gallium and germanium for power electronics; graphite for battery anodes. The IEA’s Critical Minerals Outlook tracks demand projections for this basket against announced supply.
Mining versus refining
The geographic concentration story is very different at the two stages. Cobalt mining is dominated by the Democratic Republic of Congo; cobalt refining is dominated by China. Lithium mining is split between Australia (hard rock) and the Andean “lithium triangle” (brines); lithium refining is again concentrated in China. Rare-earth mining has diversified somewhat away from China; rare-earth separation and metallization remain heavily Chinese. A “supply concentration” chart that uses only mine-stage data understates the actual choke point.
Reserves are not destiny
Reserves figures from USGS Mineral Commodity Summaries report what is economically extractable at current prices and current technology. They expand when prices rise (more deposits become economic) and contract when prices fall. A country’s reserves base does not, by itself, determine future production — capital, permitting, infrastructure and politics do. Resource estimates are larger than reserves and represent the longer-run geological inventory.
Reading the supply-chain picture
Concentration metrics
Supply concentration is usually summarized with the share of the top one, two, or three producers, or with a Herfindahl-Hirschman-style index. These are blunt instruments: a 70% top-producer share looks the same on the chart whether the supplier is a stable democracy or a volatile autocracy. Most criticality assessments multiply concentration by a country-risk score (governance, conflict, export controls) to capture that distinction. The composite is more informative than concentration alone, but introduces its own assumptions.
Recycling and the second supply
End-of-life recycling is increasingly counted as a parallel supply source for several minerals — most notably copper, where scrap already supplies a meaningful share of demand, and increasingly lithium, cobalt and nickel as the first wave of EV batteries reaches retirement. Recycling-rate projections are uncertain because they depend on collection systems, battery design, and the economics of dismantling versus mining. Reports that show only primary supply against demand miss the recycled stream, and reports that build optimistic recycling assumptions into a primary-supply gap may understate the gap that actually has to be filled by new mines.
Substitution
Battery chemistry has been the most visible substitution story: lithium-iron-phosphate (LFP) cathodes use less cobalt and nickel than nickel-manganese-cobalt (NMC) chemistries, and have eaten into NMC’s share of the EV market. Permanent magnets are harder to substitute away from rare earths, but motor designs that reduce or eliminate them exist. Substitution typically takes years of R&D and qualification; supply-demand charts that assume the current chemistry mix forever overstate future demand for some minerals and understate it for others.
Trade flows in upgraded form
By the time a critical mineral reaches a consumer good, it has been refined, alloyed, embedded in a component, and assembled. Trade statistics report each stage with a different commodity code. Chasing “dependency” on a particular country requires tracing the chain through several customs categories rather than reading a single line. Bilateral concentration that looks moderate in raw-material trade can be much higher when measured in the embedded form that actually enters the destination economy.
Common pitfalls
Mining-only concentration
Charts that show only mine-stage shares miss the refining choke point, which is usually the more concentrated stage. Policy questions about resilience are answered at the refining step.
Reserves as a forecast
Reserves data describes what is economic now. It does not forecast production growth or peak production. Treat reserves charts as a backdrop, not a destiny.
Single-mineral framing
Lithium, cobalt and nickel are often paired with copper in “energy transition minerals” reports. The supply pictures for the four are not interchangeable. Single-mineral charts answer narrow questions.
Ignoring substitution and recycling
Charts that project demand without substitution or recycling overstate both the gap and the urgency. Charts that assume optimistic substitution or recycling understate them. Both forms of error appear in advocacy material on the topic.
Sources
The standard references are the IEA Critical Minerals Outlook and Energy Technology Perspectives reports, the U.S. Geological Survey Mineral Commodity Summaries (annual, country-level production and reserves), the European Commission Critical Raw Materials Act criticality assessments, the British Geological Survey’s World Mineral Production, the OECD work on raw-materials trade restrictions, and UN Comtrade for trade-flow data at the harmonized-system code level. National geological surveys publish underlying production data; the international aggregators reconcile and project.
Critical minerals connect global supply chains with the technology and energy stories elsewhere on the site. They are inseparable from the discussion of the energy transition and the demand pull from AI and digital infrastructure.