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Pinnacle Receives Positive Results from Preliminary Metallurgical Tests at El Potrero with Average of 95.09% Gold Recovery
(TheNewswire) VANCOUVER, BRITISH COLUMBIA, October 28, 2025 – TheNewswire ...
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[{"type":"text","content":"Pinnacle Receives Positive Results from Preliminary Metallurgical Tests at El Potrero with Average of 95.09% Gold Recovery\n\n\n (TheNewswire)\n \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n VANCOUVER, BRITISH\nCOLUMBIA, October 28, 2025 –\n \n\n\n\n TheNewswire -\n \n\n\n\n (TSXV:\nPINN, OTC: PSGCF, Frankfurt: P9J) –\n \n\n\n\n Pinnacle Silver and Gold\nCorp.\n \n\n\n (\"\n \n\n Pinnacle\n \n\n \" or the\n“\n \n\n Company\n \n\n \") is pleased to announce positive\n \n\n results from the preliminary scoping metallurgical tests for\nthe high-grade El Potrero gold-silver project\n \n\n in\nDurango, Mexico including excellent gold recoveries up to 96.79% and\naveraging 95.09%.\n \n\n\n\n Highlights:\n \n\n\n\n\n\n Three samples from the mineralized zone within the\nPinos Cuates underground mine were sent to the SGS Lab in Durango,\nMexico for grinding, bottle roll cyanide leach and gravity tests.\n \n\n\n\n\n\n Initial grind calibration tests in a ball milling\napplication achieved a target grind of 80% passing\n \n\n 270 mesh (53 micron) particle size.\n \n\n\n\n\n\n Bottle roll cyanide leach tests resulted in\nconsistently high gold recoveries of\n \n\n\n\n 92.81%, 95.68% and 96.79%,\naveraging 95.09%\n \n\n .  Silver recoveries were lower\nand more variable, at 41.41%, 73.53% and 49.11%, with an average of\n54.68%, indicating the presence of a more complex\n \n\n mineralogy and a need for further test work\n \n\n such as extended leach times.\n \n\n\n\n\n\n Average\n \n\n unoptimized\n \n\n reagent consumption was 0.71 kg/t NaCN and 1.62 kg/t CaO,\nboth within expected ranges for a preliminary test.\n \n\n\n\n\n\n Initial gravity tests utilising a Knelson concentrator\nand Mozley table resulted in variable\n \n\n recoveries\nranging from 29.1% to 76.38% for gold and 3.98% to 15.91% for\nsilver.\n \n\n\n\n\n\n “We are very pleased with the results from this\npreliminary round of metallurgical tests\n \n\n ,\nespecially for gold recoveries, and considering that there were only\nthree samples from one of the three historic mines,” stated\n \n\n Robert Archer, Pinnacle’s President & CEO.\n “These tests were run using simple baseline parameters and without\nany optimization.  The results indicate that we need to conduct\nmineralogical tests on the mineralization to determine t...