Locksley Resources produced 99.5% pure antimony trioxide from its California mine, marking a key step in U.S. domestic critical minerals production.

Locksley Resources has produced antimony trioxide with 99.5% purity from its Desert Antimony mine in California, a milestone validating domestic refining capabilities and advancing U.S. efforts to secure critical minerals. The achievement, confirmed through bench-scale testing, supports the company’s shift from exploration to full mine-to-market processing, targeting defense and industrial markets requiring high-purity antimony. Locksley has begun diamond drilling to expand known mineralization and is preparing data for U.S. Department of Energy critical minerals programs, reinforcing national goals for supply chain resilience.