Pinnacle Receives Positive Results from Preliminary Metallurgical Tests at El Potrero with Average of 95.09% Gold Recovery

On October 28, 2025, Pinnacle Silver and Gold Corp. announced positive results from preliminary scoping metallurgical tests on three samples from its El Potrero gold-silver project in Durango, Mexico. The tests demonstrated excellent gold recoveries, averaging 95.09% and reaching up to 96.79%. CEO Robert Archer noted that these results were achieved using simple, unoptimized baseline parameters and indicate the need for further mineralogical tests to understand the nature of the gold and silver occurrences.

This news is materially positive. Metallurgical results are a critical and often overlooked de-risking milestone for any exploration project. Achieving an average gold recovery of over 95% from preliminary, non-optimized tests is an excellent result and significantly increases the probability of the project being economically viable.

This positive development builds upon a consistent stream of strong exploration news over the past year, which has included high-grade channel sampling results and the identification of new mineralized veins. While exploration results show what is in the ground, metallurgical results confirm it can be efficiently extracted. This announcement provides a crucial data point that will be essential for any future economic study (e.g., a PEA).

The market expects junior explorers to systematically de-risk their projects, and this is a textbook example of the company successfully advancing El Potrero along the development curve. It follows the recent strengthening of the management team aimed at moving towards a production scenario. The result is in line with optimistic expectations for a low-sulphidation epithermal system but is by no means a guaranteed outcome, making this a firm success for the company.

Pinnacle Silver and Gold is a Canadian junior exploration company focused on its flagship El Potrero gold-silver project in Durango, Mexico. The project is a low-sulphidation epithermal vein system located in the prolific Sierra Madre Occidental. It hosts three historical small-scale mines and a previously operational 100 tpd plant. The property was held privately for nearly 40 years and was never subjected to modern exploration or drilling prior to Pinnacle's involvement.

The company's strategy is to fast-track El Potrero to near-term production by refurbishing the existing plant. The goal is to use cash flow from this small-scale operation to self-fund larger exploration programs and make the staged acquisition payments, thereby minimizing shareholder dilution.