U.S. Rare Earth Breakthrough: Halleck Creek Achieves 97% Purity, Reducing Reliance on China

August 15, 2025
U.S. Rare Earth Breakthrough: Halleck Creek Achieves 97% Purity, Reducing Reliance on China
  • Recent results demonstrate that high-purity rare earth oxides can be produced from Halleck Creek's allanite ore, offering a promising alternative separation process, although the biotech flowsheet remains at laboratory research stage.

  • The SynBREE consortium, led by Lawrence Livermore National Laboratory, successfully produced 97.1% pure Heavy Rare Earth Oxide (HREO) and 96.4% pure Light Rare Earth Oxide (LREO) from Halleck Creek ore, marking a significant milestone.

  • These findings validate the potential for Halleck Creek to produce commercially viable rare earth oxides domestically, reducing U.S. dependence on imports, particularly from China.

  • American Rare Earths aims to develop a domestic supply chain for critical rare earth elements, reducing reliance on imports and supporting U.S. strategic industries.

  • The company continues to optimize mineral processing techniques and explore innovative technologies to enhance production efficiency and develop a cost-effective, environmentally responsible U.S.-based rare earth industry.

  • ARR has achieved an 82% overall rare earth recovery rate, with plans to improve processing through atmospheric tank leaching, and is moving toward test mining and equipment orders for a demonstration plant.

  • Upcoming milestones include completing processing studies, publishing a prefeasibility report, and securing permits, with the project progressing toward commercialization.

  • Shares of American Rare Earths increased by 4% on the ASX, reflecting investor confidence as the company advances its processing, studies, and permit applications for the Cowboy State Mine.

  • The company is continuing to optimize mineral processing techniques to improve efficiency and output.

  • The development is part of the US Department of Defense’s DARPA EMBER initiative, which aims to develop biotechnology-based methods for separating and purifying rare earth elements.

  • Research supports the development of a biotechnology-based flow sheet as an alternative to conventional mineral processing methods.

  • Halleck Creek is one of the largest U.S. rare earth projects by tonnage, with resource estimates supporting its potential as a domestic source amid rising demand for electric vehicles, wind turbines, and advanced tech.

Summary based on 6 sources


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