By Sonny Jimerson
In the high-desert landscape of Blanding, Utah, a single kilogram of white powder has signaled a potential shift in the global balance of critical mineral power. Energy Fuels Inc. recently announced the successful production of its first kilogram of 99.9% pure terbium oxide at the White Mesa Mill. While the quantity is small, the implications are vast: it represents the first time high-purity heavy rare earth elements (HREEs) have been separated from domestic ore on U.S. soil at this level of specification.
For decades, the “heavy” side of the rare earth spectrum: specifically terbium and dysprosium: has been a nearly absolute monopoly held by Chinese state-linked processors. By achieving commercial-grade purity using U.S.-sourced monazite sands, Energy Fuels is moving beyond theoretical capacity into the realm of tangible industrial supply. The milestone is a critical step toward the company’s goal of establishing a fully integrated domestic permanent magnet supply chain by 2027.
The Significance of the “Heavy” Breakthrough
The rare earth industry is often split into two categories: “light” elements like neodymium and praseodymium (NdPr), and “heavy” elements like dysprosium (Dy) and terbium (Tb). While NdPr forms the bulk of the magnets used in electric vehicle (EV) motors and wind turbines, terbium and dysprosium are the essential additives that allow these magnets to maintain their magnetism at high temperatures.
Without terbium, the high-performance motors required for defense applications, heavy robotics, and high-efficiency EVs would effectively seize under heat stress. Despite the U.S. having significant deposits of light rare earths, the separation of heavy elements has remained the “final frontier” of domestic mineral independence.
A technician at the White Mesa Mill inspects a sample of high-purity terbium oxide, marking a milestone in U.S. heavy rare earth separation.
The production of 99.9% pure terbium oxide at White Mesa was achieved through a dedicated pilot-scale separation circuit. This follows the company’s previous success in producing 30 kilograms of 99.9% pure dysprosium oxide. Combined, these two elements represent the most supply-constrained links in the global battery revolution and the broader transition to renewable energy.
Feedstock and the Monazite Advantage
The breakthrough at White Mesa is not just about the chemistry of separation, but the source of the material. Energy Fuels is utilizing monazite ore sourced from heavy mineral sand operations in Florida and Georgia.
Monazite is often treated as a byproduct of zircon and titanium mining, but it is significantly richer in rare earths: particularly the heavy varieties: than the bastnaesite ore typically found at other major deposits. Historically, monazite was difficult to process in the U.S. because it contains thorium, a radioactive element. However, because White Mesa was originally designed as a uranium and vanadium mill, it is uniquely licensed and equipped to handle radioactive byproducts, turning a historical waste problem into a competitive advantage.
This domestic sourcing strategy is essential as geopolitical tensions continue to reshape trade. With global trade wars reigniting, the ability to source, crack, and separate minerals entirely within the U.S. borders provides a level of de-risking that is increasingly attractive to the Department of Defense and automotive OEMs.
![[IMAGE] Modern mineral processing plant at sunrise](https://cdn.marblism.com/u6VkLX_7Yli.webp)
The White Mesa Mill is transitioning from a traditional uranium facility into a multi-mineral hub capable of processing complex rare earth feedstocks.
Scaling to 2027: The Commercial Roadmap
The current pilot production at White Mesa is running at a rate of approximately one kilogram of terbium oxide per week. While sufficient for testing and validation by magnet manufacturers, it is a far cry from the industrial volumes needed to satisfy the U.S. market.
Energy Fuels has laid out a clear timeline for scaling these operations:
- Pilot Refinement (2025-2026): Continued production of Tb and Dy oxides, along with planned pilot runs for samarium, europium, and gadolinium.
- Phase 1 Commercial (2027): The company expects to commission a full-scale separation circuit. At capacity, this circuit is targeted to produce:
- 12 tonnes of terbium oxide annually.
- 35 tonnes of dysprosium oxide annually.
- 850 to 1,000 tonnes of NdPr oxide annually.
- Feedstock Diversification: While current feed comes from the Southeast U.S., Energy Fuels is actively seeking to expand its monazite supply through international partnerships, similar to how the U.S. and Ukraine have partnered in other critical mineral sectors.
Strategic and Geopolitical Implications
The timing of this breakthrough is not accidental. The U.S. government has been aggressively funding the “de-risking” of junior and mid-tier mining operations to counter Chinese export controls on gallium, germanium, and most recently, graphite and certain rare earth technologies.
![[IMAGE] Defense funding and critical minerals collage](https://cdn.marblism.com/hwuB-4BMyC5.webp)
Government policy and defense funding are increasingly focused on securing the midstream processing of heavy rare earths.
By producing 99.9% pure terbium, Energy Fuels is directly addressing a vulnerability in the U.S. defense industrial base. High-purity rare earths are used in everything from sonar systems to missile guidance and fighter jet components. The ability to process these minerals domestically ensures that the “stockpiles” warned about by industry experts: which are often useless without processing infrastructure: can finally be converted into usable industrial chemicals.
Key Risks: Market Volatility and Technical Hurdles
While the technical milestone is significant, the path to 2027 is fraught with the typical risks of the mining and chemicals sector.
1. Market Pricing and Chinese Dominance:
China remains the “price setter” for rare earths. In the past, state-subsidized Chinese firms have flooded the market to depress prices, making it difficult for Western startups to achieve profitability. Energy Fuels must navigate a market where the Per Geijer rare earth discovery in Sweden and other international projects are also racing to fill the gap.
2. Permitting and Regulatory Oversight:
Scaling a radioactive-bearing mineral circuit requires stringent environmental compliance. While White Mesa has the licenses, any expansion will be under intense scrutiny from environmental groups and local stakeholders. Navigating the social license in 2026 is a complex task for any operator.
3. Execution Risk:
Moving from a 1kg-per-week pilot to a 12-tonne-per-year commercial operation is a massive engineering leap. The “crack-and-separate” chemistry for monazite is notoriously difficult to maintain at high throughput without sacrificing purity.
The Role of White Mesa in the Broader Energy Nexus
The transition of White Mesa is part of a larger trend where traditional mining infrastructure is being repurposed for the green energy transition. The mill continues to produce uranium, which is seeing its own surge in demand due to the nuclear renaissance and SMR development.
By operating as a dual-stream facility: producing both the fuel for carbon-free power and the minerals for carbon-free transport: Energy Fuels is positioning itself as a central pillar of the North American energy nexus.
![[IMAGE] Mining engineers inspecting strategic mineral samples](https://cdn.marblism.com/6QOOiP2_mKT.webp)
Engineers are increasingly focused on the “midstream” of the supply chain: the chemical separation of ores into high-purity oxides.
Conclusion
The first kilogram of terbium oxide from White Mesa is a proof of concept that the United States can reclaim its position in the heavy rare earth supply chain. For investors and industry watchers, the focus now shifts from “can they do it?” to “can they scale it?”
The 2027 target for commercial production will be a bellwether for the entire U.S. critical minerals strategy. If Energy Fuels succeeds, it will break a decade-long monopoly and provide the foundation for a more resilient, domestically-anchored high-tech economy. For now, the small pile of white oxide in Utah stands as a quiet but powerful rebuttal to the narrative of total foreign dependence.
