Locksley Reports High-Grade Antimony Concentrate at Significantly Higher Grades than Comparable American Projects in Initial Metallurgical Test Work of Surface Samples from the Company's Desert Antimony Mine Project in California

Locksley Resources (OTCQB: LKYRF) reported initial metallurgical test work on surface samples from its Desert Antimony Mine in California produced a 68.1% antimony (Sb) flotation concentrate from first-pass rougher/regrind/cleaner tests.

Rhea-AI Summary

Locksley Resources (OTCQB: LKYRF) reported initial metallurgical test work on surface samples from its Desert Antimony Mine in California produced a 68.1% antimony (Sb) flotation concentrate from first-pass rougher/regrind/cleaner tests. The company said this grade is ~95% of the technical maximum stibnite grade of 71.68% and comfortably exceeds a cited marketable threshold of 55% Sb. Locksley plans to collect a bulk underground sample for further testwork and ingot production and highlighted a collaboration with Rice University to develop DeepSolv™ for domestic antimony processing.

Positive

• 68.1% Sb first-pass flotation concentrate achieved
• Concentrate equals 95% of technical maximum stibnite grade (71.68% Sb)
• Reported concentrate grade well above 55% marketable sales threshold
• Bulk-sample program commencing for further testwork and ingot production

Negative

• Results based on only two preliminary tests on surface samples
• No recovery rates or scalable processing results disclosed yet

Argus Oct 8 session

-0.63% close to close Open Argus

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News Market Reaction – LKYRF

On Oct 8, the day this news came out, LKYRF closed 0.63% below the previous close.

Data tracked by StockTitan Argus for the Oct 8 session.

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SAN BERNARDINO, Calif., Oct. 8, 2025 /PRNewswire/ -- Locksley Resources, (ASX: LKY; OTCQB: LKYRF) announced that the company's advancing metallurgical test work program being conducted on surface samples collected from the Desert Antimony Mine (DAM) Prospect at the company's project in the Mojave Desert is producing concentrate grades believed to be significantly higher than comparable American projects (as reported in publicly available information from Perpetua, Nova Minerals, US Antimony Corp, Costerfield and Hillgrove).

According to early results, excellent high grade final flotation concentrate of 68.1% antimony has been achieved from first pass rougher/regrind/cleaner flotation tests. The concentrate is 95% of technical maximum stibnite grade of 71.68% showing minimal impurities, significantly exceeding marketable sales requirements of a minimum of 55%.

High-grade antimony (Sb) concentrate was achieved with only two preliminary tests, indicating minimal flowsheet development is expected to be required to maximize both grade and recovery. Work is commencing to collect a bulk sample from the underground workings for further testwork and production of antimony ingot. More detailed information here: https://cdn-api.markitdigital.com/apiman-gateway/ASX/asx-research/1.0/file/2924-03005038-6A1288944&v=undefined.

Grades at this level of purity are much sought after by the U.S. government as a result of the US priority for a fully 100% Made in America strategy for critical minerals. Antimony is one of these minerals, particularly due to its use in munitions, semiconductors and energy systems. Locksley's own strategy aligns with that of the US government and the company continues to rapidly advance their efforts in this area.

Locksley Resources (https://www.locksleyresources.com.au) is an Australian-based explorer focused on critical minerals and base metals, with assets in both the U.S. and Australia. The company is actively advancing its U.S. Asset, the Mojave Project, in California, targeting rare earth elements (REE) and antimony (The Desert Antimony Mine). The company also has a strategic collaboration with Rice University to develop DeepSolv™ for domestic processing of North American antimony. This agreement is a cornerstone of Locksley's U.S. Critical Minerals and Energy Resilience Strategy to accelerate "mine-to-market" deployment of antimony in the U.S.

Contact: Beverly Jedynak, beverly.jedynak@viriathus.com, 312-943-1123; 773-350-5793 (cell)

View original content:https://www.prnewswire.com/news-releases/locksley-reports-high-grade-antimony-concentrate-at-significantly-higher-grades-than-comparable-american-projects-in-initial-metallurgical-test-work-of-surface-samples-from-the-companys-desert-antimony-mine-project-in-california-302577683.html

SOURCE Locksley Resources

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What antimony grade did Locksley (LKYRF) report from the Desert Antimony Mine on Oct 8, 2025?

Locksley reported a 68.1% antimony flotation concentrate from initial surface-sample test work.

How does the 68.1% Sb concentrate compare to marketable requirements for antimony?

The reported 68.1% Sb exceeds the cited marketable sales minimum of 55% Sb.

Are Locksley’s Desert Antimony Mine test results production-scale for LKYRF?

No; results are from preliminary surface-sample tests and Locksley is commencing a bulk-sample program for further testing.

Did Locksley (LKYRF) disclose recovery percentages for the 68.1% Sb concentrate?

No recovery percentages were disclosed in the initial announcement.

What’s the significance of 95% of technical maximum stibnite grade reported by Locksley (LKYRF)?

Locksley said the 68.1% Sb concentrate is about 95% of the theoretical stibnite maximum of 71.68% Sb, indicating minimal impurities in the sample concentrate.

Will Locksley (LKYRF) pursue domestic processing for antimony?

Locksley highlighted a strategic collaboration with Rice University to develop DeepSolv™ for North American antimony processing as part of its U.S. strategy.