American Tungsten (TSXV: TUNG; US-OTC: TUNGF) has published an initial mineral resource estimate for its Ima project in northeast Idaho, an announcement that positions the asset as the highest-grade tungsten project in the state in which the critical metal is the primary commodity. The company's shares rose on the news. The maiden estimate outlines 316,000 in the indicated category, as reported by The Northern Miner.

Under Canadian mineral reporting standards, the indicated category reflects a level of geological confidence sufficient for technical and economic parameters to be applied in evaluating a deposit's economic viability, while a mineral resource on its own does not demonstrate that a deposit can be mined profitably. The Northern Miner's report frames the new estimate as a boost to a tungsten revival in Idaho, a state with a historical record of tungsten mining.

Tungsten has the highest melting point of any metal and is valued for its exceptional hardness and density. These properties make it a key input for cemented carbide cutting tools, wear-resistant components, electrical and electronics applications, and defense uses such as high-density alloys and munitions.

The metal is included on the U.S. government's list of critical minerals, a designation applied to non-fuel minerals assessed as having essential economic or national-security functions together with exposure to supply risk. According to the U.S. Geological Survey, the United States has recorded no commercial tungsten mine production since 2015 and depends on imported material, with China accounting for roughly 80% of global mine output. China's commerce ministry added a policy dimension to that dependence in February 2025, when it imposed export controls on certain tungsten-related items. The Ima resource estimate therefore arrives amid renewed interest in building domestic supply of the strategic metal.