Antimony Mining News

Red Mountain to restart US antimony exploration activities

2026-04-13

Red Mountain Mining is relaunching antimony exploration across its US projects, including Thompson Falls in Montana-Idaho and Yellow Pine and Silver Dollar in Idaho, capitalizing on favorable weather conditions. This strategic move aims to define significant antimony resources, with initial rock chip analysis from Thompson Falls showing up to 36.5% antimony, and is supported by new advisory appointments and expedited environmental approvals. The initiative aligns with US government efforts to secure domestic critical mineral supplies, particularly antimony, reducing reliance on foreign sources.

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Mining operations resume at USAC’s Stibnite Hill property

2026-04-07

The United States Antimony Corporation (USAC) has recommenced mining activities at its Stibnite Hill property in Thompson Falls, Montana, significantly ahead of schedule due to unexpectedly mild winter conditions. This early restart, coupled with strategic operational enhancements and substantial government contracts totaling up to $272 million, underscores the growing national importance of domestic antimony production for critical mineral supply chain resilience and national defense.

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United States Antimony restarts mining in Montana

2026-04-06

United States Antimony Corp. (UAMY) has officially resumed mining operations at its Stibnite Hill property in Montana, marking a significant step towards establishing the first fully integrated antimony supply chain outside of China and Russia. This restart, following a near five-month weather-related halt, is crucial for bolstering the United States' domestic supply of this critical mineral, vital for numerous defense and industrial applications. The company plans to process ore into concentrates at its Radersburg facility before smelting it into finished products at its Thompson Falls smelter, the only operational antimony smelter in the United States.

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