Americas Gold and Silver announces updated results from metallurgical testing

Americas Gold and Silver (USAS) announced updated results from recent metallurgical testing on antimony contained in its copper concentrates generated during the first phase of the test program at its Galena Complex in Idaho. The testing, conducted by Allihies Engineering using its proprietary, selective industrial Alkaline Selective Leaching hydrometallurgical technology, confirms very high extraction rates of antimony are possible. The ASL technology utilized by Allihies represents an improved and optimized version of the proven industrial process used for 60 years by Sunshine Mining at its antimony plant that existed until 2002 before it was demolished. This result demonstrates the potential to unlock significant untapped value from currently unpaid by-products and positions the Company as a potential frontrunner in restoring domestic antimony product supply. For reference, antimony has been identified as a critical mineral essential for U.S. national security and economic resilience in addition to both silver and copper. Americas is celebrating a major milestone in metallurgical innovation at the Galena Complex. Recent test work has confirmed the potential to extract over 99% of antimony from the site’s copper flotation concentrate, transforming a historically overlooked by-product into a valuable revenue source while bolstering the Company’s role in the domestic supply of critical minerals. Antimony flotation recovery rates from the copper/silver tetrahedrite ore grading 1% antimony is between 90-96%. Antimony at the Galena Complex is hosted in the common sulfosalt mineral, tetrahedrite, which is an antimony sulfide of silver, copper, and iron. Although the Galena Complex has produced significant antimony over its life, the Company historically has not realized value for this material due to its then insufficient concentration and quality for smelter acceptance.