Pinnacle Silver and Gold Receives More Positive Results from Second Round of Scoping Metallurgical Tests at El Potrero with Average Gold Recovery of 97.8% for the Main Dos de Mayo Vein

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VANCOUVER, BRITISH COLUMBIA – TheNewswire - June 2, 2026 -  Pinnacle Silver and Gold Corp. (TSXV: PINN, OTCQB: PSGCF, Frankfurt: P9J) ("Pinnacle" or the “Company") is pleased to provide more positive results from the second round of scoping metallurgical tests for the high-grade El Potrero gold-silver project in Durango, Mexico.  This second round of tests was broader in scope, including seven samples compared to three in the first round, and encompassed all three historic mines on the Dos de Mayo vein rather than just the Pinos Cuates mine, as well as the Estrella and Capulin veins.   Of particular note, bottle roll leach tests for the Dos de Mayo vein continued to return consistently high gold recoveries, averaging 97.8%, while gold recoveries of 97.6% and 97.4% were obtained for the Estrella and Capulin veins, respectively.  Silver continues to be more variable due to a more complex mineralogy; however, recoveries increased to an average of 70.02% for Dos de Mayo, 64.7% for La Estrella and 80.5% for El Capulin. Highlights: Seven mineralized samples were sent to the SGS Lab in Durango, Mexico for a second round of metallurgical testing, including five samples from the three historic mines on the Dos de Mayo vein, one from the Estrella vein and one from the Capulin vein.  Head assays from the seven samples averaged 7.7 grams per tonne gold (g/t Au) and 116 g/t silver (Ag), implying a robust grade for future mill feed.    Seven corresponding sub-samples were sent to the SGS lab in Santiago, Chile for TIMA-X mineralogical analyses.  Gold in the form of electrum, a natural Au-Ag alloy, was detected in all seven samples.  In addition to the electrum, silver was also detected in all seven samples as corresponding to the common silver sulphides argentite/acanthite (AgS) and a less common silver selenium sulphide aguilarite (AgSeS).   All gold grains in the sub-samples were consistently under 50 microns in size and silver was under 80 microns, giving a guideline as to the grind size necessary for processing.  Due to the consistent grain size, variability in grades appears to show a better correlation with the number of grains detected in any given sample rather than the coarseness or type of mineral present.  The five samples from the Dos de Mayo vein were composited for grinding tests, gravity separat...

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