What the rare earth cost curve can tell us about the future of Western prices
A simple cost-curve lens cuts through much of the current confusion around Western rare earth pricing. Published assessments of warehouse or delivered material outside China have in recent periods sat at large multiples of Chinese levels for several heavy and critical oxides. These figures are frequently treated as the prices new Western producers can expect to realize. The cost curve suggests otherwise.
Cutting through the confusion
Outside China, warehouse and delivered prices for key rare earth oxides have been reported at large multiples of Chinese levels in recent periods.
Some investors and project developers treat those numbers as the prices Western projects can bank on.
The industry cost curve suggests otherwise – and the difference matters for the economics of every new mine and separation plant.
High prices provide the cure for high prices
When prices sit far above the marginal cost of existing and emerging Western production, two things happen.
First, every project on the curve looks highly profitable (see below).
Second, capital and operating decisions respond: expansion projects accelerate and new capacity is brought forward.
The resulting increase in non-Chinese supply then competes for the limited pool of Western and allied demand.
Premiums compress toward the cost of the marginal Western producer plus a durable, but not extreme, security-of-supply margin.
This dynamic is already visible in the data that matter most – actual Western-origin transactions
In 2025 the sales-weighted average price of Western-produced (i.e., ex-China) dysprosium oxide was $365/kg.
That level reflects real offtake of non-Chinese material.
It sits meaningfully above (and visibly independent of) Chinese benchmarks yet far below the peak thin-market warehouse prices cited by some.
The same logic applies with particular clarity to yttrium
Incremental production costs at the leading Western producer are low relative to the extreme warehouse assessments.
Ex-China demand is finite.
A modest number of Western or allied producers scaling recovery from existing mixed rare-earth streams (i.e., SEG+ mixtures) can cover a large share of that demand.
In such a market there is no structural reason for prices to remain multiples of the lowest-cost Western producer’s economics.
Warehouse assessments are not a reliable indication of Western prices at scale
Warehouse and residual-market assessments capture genuine short-term scarcity.
They are useful as a sentiment indicator.
They are not a reliable forecast of the clearing price once Western production responds at scale.
Project economics, offtake structures and investment models are more robust when anchored to cost curves, actual Western-origin transaction evidence, and realistic assessments of how supply will react.
Adamas Western CIF price assessments and forecasts are built on precisely this foundation: detailed production cost models, Western supply-demand fundamentals, and observed transactions of non-Chinese material.
That framework better reflects how markets ultimately clear.
Contact us if you would like to discuss our new Rare Earth Cost Curves+ service or our Western CIF price assessments and forecasts.
