Our NdPr oxide is mined, separated, and refined at the Mountain Pass Rare Earth Mine and Processing Facility in California. As the sole, large-scale producer in the Western Hemisphere, we ensure unmatched quality, provenance, and reliability, helping our customers diversify critical supply chains.

MP’s extraction and refining processes consistently produce high-purity compounds exceeding 99.5% NdPr/TREO, meeting or surpassing the stringent requirements of high-performance magnet manufacturers. Our NdPr oxide has been qualified by the world’s most scrupulous customers and is integrated into the supply chains of three of the world’s five largest automakers.

Our on-site Analytical Laboratory conducts in-process sampling and testing to ensure each lot meets customer specifications. This comprehensive approach maintains the highest standards of quality control from production through delivery. Mountain Pass is an ISO 9001-certified site.