Locksley Achieves 99.5% Purity Antimony Trioxide, Advancing U.S. Supply Chain Capability

Rhea-AI Summary

Locksley Resources (OTCQX: LKYRF) announced on March 12, 2026 that metallurgical tests upgraded Mojave Project feedstock from the Desert Antimony Mine to 99.5% purity antimony trioxide. The result supports a mine-to-market pathway to supply U.S. defense and industrial chains for a critical mineral largely concentrated in China.

The company says this milestone validates processing capability and advances domestic refining potential for high‑purity antimony products.

Positive

• 99.5% purity antimony trioxide produced from Mojave feedstock
• Mine-to-market control—ability to directly manage mining, processing and product specification
• Supports U.S. supply chains for defense and strategic industrial applications

Negative

• Global supply concentrated in China, underscoring market supply risk

News Market Reaction – LKYRF

+18.75%

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+18.75% News Effect

On the day this news was published, LKYRF gained 18.75%, reflecting a significant positive market reaction.

Data tracked by StockTitan Argus on the day of publication.

Desert Antimony Mine Feedstock Validates Potential for U.S. Mine-to-Market Production of 100% American-made, High-purity Antimony Products

SAN BERNARDINO, Calif., March 12, 2026 /PRNewswire/ -- Locksley Resources Ltd. (ASX: LKY; OTCQX: LKYRF) announced it has achieved a significant metallurgical milestone with the successful production of 99.5% purity antimony trioxide from feedstock sourced from the Desert Antimony Mine at the Mojave Project in California.

The result, achieved through the Company's metallurgical optimization program, demonstrated the potential to produce high-purity antimony products capable of helping supply strategic Western defense and industrial supply chains. Since antimony is classified as a critical mineral and the global supply is heavily concentrated in China, this achievement represents an important step in Locksley's strategy to help reestablish secure, 100% American made, antimony production and refining capability.

Locksley is one of the few antimony-focused development projects in the US capable of directly controlling mining, processing and product specification. More information is available here: https://cdn-api.markitdigital.com/apiman-gateway/ASX/asx-research/1.0/file/2924-03067362-6A1315969&v=undefined.

"Demonstrating that feedstock from the Desert Antimony Mine can be upgraded to 99.5% purity antimony trioxide is a very significant achievement and validates the potential to produce high value refined, 100% American-made antimony products from our Mojave Project," said Kerrie Matthews, CEO of Locksley. "This result reinforces the potential for our Mojave Project to play an important role in supporting future U.S. government and industrial demand for antimony," she added.

Antimony is essential for defense systems, munitions, electronics and advanced industrial applications. Achieving more than 99.5% purity antimony trioxide meets a key threshold for entry into specialized markets and enables a pathway for qualification with defense and strategic supply chain participants.

"The principal barrier to domestic antimony supply in the US is not ore availability, but the lack of US processing and refining capability," she explained, adding that this is a gap that Locksley's mine-to-market strategy is designed to address.

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 US 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 US critical minerals independence.

View original content:https://www.prnewswire.com/news-releases/locksley-achieves-99-5-purity-antimony-trioxide-advancing-us-supply-chain-capability-302711596.html

SOURCE Locksley Resources

FAQ

What did Locksley (LKYRF) announce on March 12, 2026 about antimony purity?

Locksley reported achieving 99.5% purity antimony trioxide from Mojave Project feedstock. According to the company, metallurgical optimisation produced high‑purity material that could meet specialised defense and industrial product thresholds.

How could the 99.5% antimony trioxide affect LKYRF's role in U.S. supply chains?

The result may enable Locksley to qualify for strategic supply chains requiring high purity material. According to the company, this milestone supports a mine‑to‑market pathway for American‑made antimony products for defense and industry.

Does the March 12, 2026 announcement mean Locksley (LKYRF) has commercial production?

No, the announcement reports a metallurgical milestone, not commercial output or sales. According to the company, this validates processing potential but further steps are required for qualification and scale‑up.

Why is antimony purity of 99.5% important for LKYRF and buyers?

99.5% purity meets a threshold for specialised markets and defence qualification. According to the company, that level enables a pathway for product specification and potential acceptance by strategic supply chain participants.

What strategic gap does Locksley say its Mojave Project addresses for the U.S.?

Locksley says it aims to restore domestic processing and refining capability for antimony. According to the company, the principal barrier is U.S. processing capacity, not ore availability, and their strategy targets that gap.

Will the March 2026 milestone reduce U.S. dependence on Chinese antimony supplies?

The milestone is an initial step toward domestic supply but does not immediately eliminate dependence. According to the company, producing high‑purity antimony domestically can help reestablish secure American supply chains over time.