Rare Earths Are Not Rare

The seventeen rare earth elements are, with a couple of exceptions, reasonably abundant in the earth's crust. Cerium is more common than copper. The name is a historical accident from an era when they were difficult to isolate and were found in unfamiliar minerals.

They are, however, a genuine chokepoint, and understanding why requires abandoning the mental image of a mine.

The elements occur together, in the same ores, with chemical properties so similar that separating them is the whole problem. Industrial separation involves hundreds of stages of solvent extraction, repeated over and over to achieve purity, generating large volumes of waste, some of it radioactive because the ores also contain thorium. It is capital intensive, technically demanding, low margin and environmentally punishing.

China holds roughly 60 per cent of global mining and roughly 90 per cent of global refining capacity. The gap between those two numbers is the entire strategic story.

How it happened is not mysterious and does not require a conspiracy. The refining is unpleasant. Countries that could have hosted it decided, through ordinary environmental politics conducted by people acting in good faith, that they would rather not. One country was willing to accept the cost. Over thirty years the capacity migrated, one permitting decision at a time, and at no point did anybody in any of those countries believe they were making a strategic concession, because at each individual decision they were not.

In 2025 China introduced two waves of export licensing, covering named medium and heavy rare earths and, significantly, the equipment used to refine them.

That last clause is the move from the chip chapter played in the other direction. Controlling the tools rather than the output attacks the capacity to compete rather than the current supply, and it is a considerably sharper instrument.

But export controls on materials are self-limiting in a way that is worth understanding, because it shapes how they get used.

The moment restrictions bite, the value of every alternative rises at once: other deposits, other refiners, recycling, substitution, and the research programmes that were never quite economic. Used hard and for long enough, a control funds the alternatives that end the leverage it was built on. The rational strategy is therefore to threaten, to demonstrate, and to relent, which is broadly what has been observed.

The remaining question is why nobody fixed this earlier, and the answer is the same as the previous two chapters.

Rare earths are a minute share of the cost of the products that need them. A magnet worth a few dollars sits inside a machine worth thousands. No individual purchaser ever felt the exposure strongly enough to fund a second source, because for each of them the risk genuinely was small. Everybody's private risk was small and the system's aggregate risk was enormous, and no actor existed whose job was to notice the difference.

That gap, between private cost and collective exposure, has now appeared three times in three chapters about entirely unrelated industries. Once you have the shape, you will find it in a dozen supply chains that have not yet had their year of headlines.