Locksley Resources Limited (ASX: LKY, OTCQX: LKYRF, FSE: X5L) is pleased to announce a landmark achievement with the successful production of a 100% American-made antimony ingot, marking the first domestically sourced and refined antimony metal produced in the United States in decades.
The milestone validates the only known U.S. mine-to-metal supply chain for antimony, entirely independent of Chinese processing, and represents a major step forward for American critical minerals self-sufficiency. Ore was sourced from Locksley’s Mojave Desert Antimony Mine in California and refined by Hazen Research Inc. in Colorado, one of the nation’s most respected metallurgical and process development laboratories.
This achievement directly supports U.S. government and Presidential Executive Orders aimed at rebuilding domestic production of critical minerals vital to defense, clean energy, and advanced manufacturing supply chains.
Locksley is working closely with its Washington D.C. –based strategic advisors, GreenMet, to advance permitting, funding, and strategic engagement initiatives that will underpin the next stage of the Company’s commercialisation strategy.
Kerrie Matthews, Locksley CEO, commented:
“This is a defining milestone for Locksley and the United States. The successful casting of the first 100% American made antimony ingot in decades, demonstrates mine-to-metal production is not only possible but is already underway.
We’ve proven the concept, and now our focus turns to scaling this achievement into a sustainable, commercial supply chain that supports America’s industrial and defense sectors. This is just the beginning, the foundation has been set, and we look forward to updating the market on the next steps for Locksley and its strategy to support America’s critical minerals independence.”
A National Milestone for U.S. Critical Minerals
The breakthrough underscores growing momentum behind U.S. efforts to rebuild domestic critical mineral supply chains, aligning with strategic objectives to reduce dependency on China.GreenMet CEO Drew Horn said the achievement “is not only a technical success, but also a national milestone,” adding that it represents “precisely the kind of outcome U.S. policymakers and industry leaders have been seeking to re-establish domestic supply chains for critical minerals. ”
Locksley is now advancing toward pilot-scale production in the United States to confirm scalability, metallurgical recoveries, and process efficiency for future commercial supply to the defense and industrial sectors.
This phase will also support offtake readiness and qualification as Locksley cements its role as the leading U.S. developer of domestically produced antimony metal.
Strategic Timing and Bilateral Relevance
The announcement coincides with a renewed focus on U.S. –Australia cooperation in critical minerals, with Australian Prime Minister Anthony Albanese meeting President Trump in Washington this week to strengthen bilateral supply chain partnerships.
As the first company in decades to deliver a 100% American-made antimony ingot, Locksley’s success positions it at the forefront of this trans-Pacific strategic initiative, reinforcing both nations’ shared commitment to secure, allied production of critical materials essential for defense, energy, and advanced manufacturing.
Next Steps
With proof-of-concept achieved, Locksley is now transitioning from validation to pilot-scale and pre-commercial operations. Upcoming milestones include:
- Scaling up to a U.S.-based pilot facility to validate efficiency and repeatability under commercial conditions.
- Process flow-sheet optimisation using test data from Hazen Research to refine larger-scale design inputs.
- Engagement with U.S. Government and industrial partners for offtake qualification, funding, and strategic collaboration.
- Advancement of permitting and funding initiatives with GreenMet to establish a fully integrated, American-controlled antimony production capability.
About us:
About Locksley Resources Limited
Locksley Resources Limited is focused on critical minerals in the United States of America. The Company is actively advancing the Mojave Project in California, targeting rare earth elements (REEs) and antimony. Locksley is executing a mine-to-market strategy for antimony, aimed at re-establishing domestic supply chains for critical materials, underpinned by strategic downstream technology partnerships with leading U.S. research institutions and industry partners. This integrated approach combines resource development with innovative processing and separation technologies, positioning Locksley to play a key role in advancing U.S. critical minerals independence.
Contact details:
Kerrie Matthews – Chief Executive Officer
T: +61 8 9481 0389 | E: [email protected]
Jane Morgan – Investor & Media Relations
T: +61 (0) 405 555 618 | E: [email protected]
