The Mineral Most People Have Never Heard Of
For roughly 25 years, China quietly cornered the global antimony market — acquiring mines around the world and consolidating refining capacity until it controlled approximately 80% of the worldwide supply. Most people outside the defense and industrial sectors barely noticed. Then, in September 2024, China cut off all antimony shipments to every country, including the United States. Overnight, a mineral that few had heard of became a matter of national security.
Why Antimony Matters
Antimony is one of those unglamorous but irreplaceable elements woven into both civilian and military life. In its refined form — 99.7% pure ingots weighing 50 pounds each — it serves as a critical input for defense applications, serialized, palletized, and shipped to the Department of War for strategic reserves or distribution to military contractors. Beyond defense, antimony is a necessary ingredient in solar panels, an industry experiencing rapid domestic expansion. It also appears in flame retardants, batteries, and a range of industrial products that keep modern infrastructure running.
The price trajectory tells the story of disruption: antimony surged from around $5 per pound to $30 per pound before settling near $18, with demand still climbing. A single 50-pound ingot now commands roughly $20,000.
Rebuilding Domestic Capacity
The United States currently has only one fully integrated antimony producer outside the China-Russia axis. When China's export ban hit, the Department of Defense scrambled — sending multiple teams to evaluate domestic production sites in Montana and Alaska. The result was a $248 million contract to supply antimony ingots for strategic reserves.
The scale of expansion underway is dramatic. A facility in Thompson Falls, Montana, is being upgraded from roughly 100 tons per month to 400–500 tons per month — a four- to fivefold increase. A second facility in Mexico, reactivated in April 2024, adds another 200 tons of monthly capacity. The target for 2026 alone is approximately $85 million worth of ingot deliveries to the military, with industrial customers being served first.
This expansion is being funded strategically: the initial $27 million received from the Department of War effectively reimburses the capital expenditure on upgrades that began in May 2024. The philosophy is contracts first, then capacity — calculated risk rather than speculative building.
The Executive Order and Supply Chain Reshoring
Adding momentum to the domestic push is an executive order set to take effect in 2027 requiring that any company supplying the US government source its raw materials from American producers. This mandate is already reshaping procurement patterns. Companies that previously purchased antimony from Belgium, Japan, or Southeast Asia are now being forced to source domestically, funneling additional demand toward the limited US production base.
Beyond Antimony: Tungsten and Zeolite
The strategic minerals story extends well beyond antimony. A new tungsten development in Canada — backed by a third-party reserve report estimating $4.6 billion in future revenue — positions North America to have its first tungsten production in 12 years. Tungsten, the second hardest mineral after diamond, is essential for submarines, tanks, and the drill bits found at any hardware store. Like antimony, it is a material where dependence on foreign sources carries unacceptable risk.
Meanwhile, zeolite operations in Idaho serve a different but equally practical set of needs: water purification for pools and wastewater facilities, and animal feed supplements that improve protein absorption in livestock.
Joint Ventures and New Technology
Strategic partnerships are accelerating the buildout. A recently announced joint venture with a Montana-based silver mining company is constructing a new hydrometallurgical processing facility in Idaho — using proprietary technology originally developed in Bolivia. This facility will convert antimony sludge, a byproduct of silver and copper mining, into antimony flake that feeds directly into smelting furnaces. The arrangement is mutually beneficial: the mining partner monetizes what was previously a low-value byproduct, and the refiner secures an additional domestic feedstock source. The facility is already in engineering and design, with construction expected to take 12 to 18 months.
A Permanent Shift
Perhaps the most striking assessment is the belief that China will never reopen antimony exports. If that proves true, the current disruption is not a temporary shock but a permanent restructuring of global supply chains. The countries and companies that move fastest to establish domestic refining capacity will hold an enduring strategic advantage.
What the antimony crisis reveals is a broader vulnerability: decades of offshoring critical mineral supply chains left the United States dependent on geopolitical rivals for materials essential to both national defense and the energy transition. The scramble to rebuild that capacity is underway, but it is a race against both time and rising demand. The lesson is clear — strategic minerals require strategic thinking long before a crisis forces action.