Geologists working in a remote corner of Utah say they have identified an unusually rich deposit of rare metals, buried not in solid rock but in sponge‑like clays. Early economic models suggest this site alone could hold up to €120 billion (£103 billion) worth of critical minerals, with direct implications for electric cars, artificial intelligence and US–China tensions.
A quiet plateau that could reshape the rare earths race
The project sits in Silicon Ridge, Utah, an arid landscape more associated with ranching and red rocks than with cutting‑edge technology. Yet beneath roughly 260 hectares of land, US company Ionic Mineral Technologies (Ionic MT) says it has mapped clays saturated with rare and critical metals.
These clays are what geologists call “ionic clays”. Over thousands of years, they behaved like geological sponges, trapping metals that washed through with groundwater and volcanic fluids. That process produced an unusually concentrated mix of elements that modern industry now badly wants.
China dominates this field. It controls more than 70% of heavy rare earth supply and over 80% of the global market for rare earth processing. The Utah find is drawing attention because deposits of this type, outside China, are extremely uncommon.
On just a fraction of the Silicon Ridge site, early estimates point to tens of billions of euros in in-ground metal value.
Ionic MT has not based its claims on a handful of promising samples. The company has drilled 106 boreholes, sunk more than 10,000 metres of core, and opened 35 trenches to examine the mineralised layers. Across the area already studied, the clays contain an average of 2,700 parts per million (ppm) of critical metals.
For comparison, Chinese ionic clay deposits commonly range between 500 and 2,000 ppm. If those numbers hold as drilling expands, Silicon Ridge would sit near the top end of global grades for this type of resource.
A cocktail of 16 strategic metals in one place
The appeal is not just the grade, but the mix. On a limited footprint, geologists have identified at least 16 different high‑value elements. These include:
- Lithium for batteries in electric vehicles and grid storage
- Gallium and germanium for chips, 5G equipment and satellite systems
- Tungsten and vanadium for hard metals and high‑strength alloys
- Light and heavy rare earths used in magnets, lasers and defence systems
That combination is unusual. Many mines specialise in one or two main products, then need complex circuits to capture small by‑products. Here, the clays appear to naturally host a broad “basket” of elements that align almost perfectly with US industrial policy priorities.
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A single deposit feeding batteries, magnets and high‑end chips would give US manufacturers a level of supply security they have not enjoyed for decades.
For policymakers trying to de‑risk supply chains built around Chinese exports, this kind of diversified deposit is politically attractive. It offers a base for domestic processing plants, research centres and downstream factories in areas like magnets and cathode materials.
A softer extraction process without acids or giant furnaces
Mining clays does not look like an open‑pit copper mine with dynamite and crushing mills. Ionic MT says its process relies on low‑temperature ion‑exchange methods, rather than high‑heat furnaces or aggressive acid leaching.
An environmental pitch that stands out
Instead of roasting ore at hundreds of degrees or using concentrated acids, the company plans to wash the clays with relatively mild solutions that coax the metals out. In theory, this produces far less air pollution and avoids the large acid ponds associated with some Chinese rare earth operations.
The firm is targeting metal recovery rates of around 95%, which would put the operation among the more efficient on the market. A high recovery rate means more value from each tonne of clay and less waste left in tailings.
Permits for the mining site and a processing plant have already been obtained, according to Ionic MT. The choice of the name “Silicon Ridge” is not accidental: a nod to Silicon Valley, but rooted in the geology beneath Utah’s soil.
Breaking Beijing’s grip on critical minerals
Rare earths and related metals sit at the intersection of technology and geopolitics. They go into missile guidance systems, fighter jets, wind turbines, EV motors and data‑centre hardware. Whenever tensions rise between Washington and Beijing, these elements quietly move up the agenda in the Pentagon and the White House.
China has used export controls on gallium, germanium and some rare earths as a diplomatic lever in recent years. That has pushed the US to seek domestic sources, or at least friendly suppliers. Silicon Ridge fits squarely into that push.
US lawmakers in Utah describe the project as a “historic moment” for industrial sovereignty, reflecting anxiety in Washington about being cut off from Chinese supplies.
The US Department of Defense, federal agencies and some states have begun offering grants, tax credits and long‑term purchase agreements to get new mines off the ground. A deposit that can plausibly anchor a full US supply chain, from raw clay to finished magnets, is likely to attract that support.
From 45–65 billion to 120 billion euros: how the numbers stack up
The headline figure of €120 billion rests on a series of assumptions, but it illustrates the scale of what is at stake. Here is how the current estimates break down.
The first 11%: a lucrative test case
So far, only around 12 million tonnes of clay have been studied in detail. At an average grade of 2,700 ppm, that translates to about 32,400 tonnes of commercially recoverable metals.
Using 2024–2025 market prices for heavy rare earths, gallium, germanium and lithium, analysts working on the project arrive at an approximate blended value of €1,400 per kilogram of contained metal. That gives a rough, in‑ground value of between €45 billion and €65 billion for the already‑defined part of the resource.
This area represents just 11% of the total zone Ionic MT wants to investigate. If similar grades continue across the rest, the potential gross value would climb beyond €120 billion. Those numbers do not account for the cost of mining, processing, infrastructure, financing and reclamation, but they still show why banks are paying attention.
The company has already partnered with a major investment bank, a sign that a fundraising round is likely as it shifts from drilling to industrial build‑out.
How rare earth prices compare
Part of the enthusiasm around this Utah deposit comes from the high unit prices of several rare earths. Even small tonnages can generate significant revenue. Typical late‑2025 price ranges include:
| Element | Approximate price (€ / kg) | Notes |
| Neodymium (metal) | 140–150 | Used in high‑performance permanent magnets |
| Dysprosium (oxides) | 420–450 | Improves heat resistance of magnets in EVs and wind turbines |
| Terbium (oxides) | 780–980 | Critical for green phosphors and high‑end magnets |
| Yttrium (oxides) | 25–30 | Used in LEDs, lasers and some ceramics |
| Scandium (high purity) | 3,200–3,300 | Alloying element for lightweight aerospace aluminium |
These figures help explain why clays with “only” a quarter of a percent metal content can still underpin multibillion‑euro projects.
What this could mean for EVs, defence and jobs
New supply lines for electric cars and clean energy
If Silicon Ridge moves into production, carmakers and wind turbine manufacturers would have a US‑based source of magnet metals such as neodymium and dysprosium. That reduces the risk of price spikes or export limits derailing climate targets.
Batteries would also benefit. Even a modest lithium credit from the deposit can support domestic cell plants, which in turn feed US and European electric vehicle markets. Having lithium, gallium and rare earths in one project simplifies supply contracts for large manufacturers.
Regional development in Utah
For Utah, the project promises new industrial jobs in areas that have relied on mining for generations but often missed out on the tech boom. Beyond direct employment at the mine and plant, there is scope for service companies, engineering firms and training programmes at local colleges.
States often compete for these projects with tax breaks and infrastructure support. Utah’s political leadership is already framing Silicon Ridge as a cornerstone of a new “critical minerals corridor” that could host refineries, metal alloy plants and magnet factories.
Risks, timelines and what could still go wrong
No mine is a sure bet, even with strong grades and political backing. Silicon Ridge still faces key hurdles.
- Technical risk: Lab results need to scale to industrial plants without dramatic cost increases.
- Permitting and local support: Early permits are in place, but any expansion or new infrastructure can face legal challenges.
- Price volatility: Rare earth and battery metal prices move fast. A slump could delay investment decisions.
- Competition: Projects in Canada, Australia and Europe are racing for the same buyers and government incentives.
Investors will watch the economic study expected in the first half of 2026. That report should lay out projected operating costs, expected revenues and payback periods under different price scenarios. If those numbers look attractive, construction could begin before the decade’s end, with first production a few years later.
Key concepts worth unpacking
What are “ionic clays” and why do they matter?
Ionic clays are soft, fine‑grained sediments where rare earth elements bind weakly to clay particles. Instead of blasting and crushing hard rock, miners can strip the clay and wash the metals out with chemical solutions. This can lower energy use and reduce dust and noise.
China’s southern provinces pioneered this style of mining, but years of poorly regulated activity left scars: deforested hillsides, contaminated streams and informal operations. Companies like Ionic MT want to show that the same geology can be worked with stricter rules, lined ponds and proper waste management.
Simulating the impact of a new mine on supply chains
Imagine Silicon Ridge reaches full production and supplies a significant share of US demand for certain heavy rare earths. A US magnet factory could sign a long‑term contract with the Utah operation, rather than relying on Chinese oxides shipped across the Pacific. That allows more predictable pricing and supports further investment in downstream plants.
Multiply that effect across batteries, defence electronics and satellite components, and the project starts to function as a backbone for an entire industrial ecosystem. Other countries are running similar simulations, which is why critical minerals have shifted from obscure geological reports to front‑page economic and security briefings.