Key Highlights Metallurgical test work confirms Halleck Creek ore can be upgraded by 10:1 , validating a simple and effective early-stage beneficiation process. 93.5% of non-rare earth material can be removed early in processing , meaning only 6.

5% of mined ore requires further refining, significantly reducing processing costs. This metallurgical milestone confirms the 10x upgrade assumption in the Scoping Study 1 , supporting the PFS flowsheet and further de-risking the project Optimization work is ongoing to enhance recoveries, streamline processing, and lower costs, supporting the upcoming Pre-Feasibility Study (PFS). DENVER, Feb.

20, 2025 (GLOBE NEWSWIRE) -- American Rare Earths (ASX: ARR | OTCQX: ARRNF and AMRRY) (“ARR” or the “Company”) is pleased to announce the successful completion of large-scale metallurgical test work at its Halleck Creek Rare Earths Project in Wyoming, USA. 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 sa.