Metallurgical Milestone Achieved At Halleck Creek

DENVER, CO - American Rare Earths announced the successful completion of large-scale metallurgical test work at its Halleck Creek Rare Earths Project in Wyoming. Recent testing, conducted in collaboration with Mineral Technologies, confirms that Halleck Creek ore can be efficiently upgraded at scale using conventional, low-cost methods, reinforcing the strong fundamentals of the project.

Test work successfully upgraded mineralized feedstock from 3,438 ppm (0.34%) TREO to approximately 37,200 ppm (3.72%) TREO—a 10:1 increase in rare earth concentration. This means that for every tonne of ore mined, only 6.5% requires further refining, reducing processing volumes and potentially lowering operating costs. This work was performed on a 1.9-tonne sample of crushed core material, using MG12 Spirals and Induced Roll Magnetic Separation (IRMS) technology—both commercially proven processing methods.

CEO, Chris Gibbs, said, “These results confirm exactly what we anticipated—Halleck Creek ore can be efficiently upgraded using simple, low-cost conventional processing methods. Successfully demonstrating this at production scale is a major milestone, further de-risking the project as we advance toward development.”

This large-scale test work validates the 10x upgrade assumption in our Scoping Study1 and provides further confidence in the project’s potential. With these results in hand, we will issue an Updated Scoping Study shortly, incorporating the JORC Resource increase announced earlier this month.”

“Looking ahead, we are advancing metallurgical test work to optimize processing efficiency and conducting hydrometallurgical testing to refine our flowsheet. This work remains on track to support the development of our Pre-Feasibility Study.”