What heavy rare earth elements were found at Idaho Strategic Resources' Diamond Creek project, and at what concentrations?

Idaho Strategic Resources reported significant concentrations of heavy rare earth elements—including yttrium—at its Diamond Creek project; surface sampling across a 3.2-kilometer lineament revealed average total rare earth oxides of 1.8%, with enriched heavy rare earth oxides exceeding 2,000 ppm and yttrium over 1,300 ppm.

Why is the Diamond Creek discovery considered strategically important for the United States?

The discovery is seen as a potential domestic source for critical materials, aimed at reducing U.S. reliance on foreign supply chains.

Idaho Strategic Resources Reports Significant Concentrations of Heavy Rare Earth Elements, Including Yttrium at Its Diamond Creek Project

Jul 23, 2026

Idaho Strategic Resources reported significant heavy rare earth element concentrations, including over 1,300 ppm yttrium, at its Diamond Creek project, offering a potential domestic source to reduce foreign supply chain reliance.

Morningstar

Idaho Strategic Resources Reports Significant Concentrations of Heavy Rare Earth Elements, Including Yttrium at Its Diamond Creek Project

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