Locksley Resources has dropped the company’s most significant milestone to date in its bid to re-establish a domestic antimony industry in the United States, unveiling a large and unusually high-grade exploration target at its Desert Antimony mine in California.

The target, built from a combination of underground surveying, detailed surface mapping and extensive geochemical sampling, suggests the historic mine may still be hosting between 772,000 and 1,382,000 tonnes grading 2.5 to 4.9 per cent antimony.

Locksley Resources’ Desert Antimony project leases in California, with MP Materials’ huge Mountain pass rare earths mine in the background.

Given that the US currently produces no antimony on its own soil, the numbers are eye-catching. The grades and tonnage translate to between 19,400

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