Northwire Canada EditionTuesday, August 25, 2026
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GOLD 4722.80 +0.5% SILVER 68.91 +0.5% COPPER 6.71 +1.6% OIL 80.72 −5.0% PALLADIUM 1340.25 −1.7% OTMC 0.600 +34.8% OPW 0.130 +4.0% HI 0.165 +10.0% VCU 1.33 +1.5% DLTA 0.175 −5.4% EMO 0.400 −1.2% GR 0.070 +0.0% MGG 0.400 +2.6% EVI 0.520 −5.5% AVL 9.43 +17.7% VCG 1.50 +9.5% TTS 2.26 −13.1% SCMI 1.90 +2.7% RIO 3.63 +6.5% PUMA 0.115 −11.5% TRR 0.350 −2.8% GOLD 4722.80 +0.5% SILVER 68.91 +0.5% COPPER 6.71 +1.6% OIL 80.72 −5.0% PALLADIUM 1340.25 −1.7% OTMC 0.600 +34.8% OPW 0.130 +4.0% HI 0.165 +10.0% VCU 1.33 +1.5% DLTA 0.175 −5.4% EMO 0.400 −1.2% GR 0.070 +0.0% MGG 0.400 +2.6% EVI 0.520 −5.5% AVL 9.43 +17.7% VCG 1.50 +9.5% TTS 2.26 −13.1% SCMI 1.90 +2.7% RIO 3.63 +6.5% PUMA 0.115 −11.5% TRR 0.350 −2.8%
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Pinnacle 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

El Potrero Metallurgical Refinement Cuts Processing Complexity, But Dilution and Permitting Headwinds Cap Near-Term Upside

By The Northwire Desk — AI Analysis Jun 02, 2026 · 07:01 PINN · 0.11 Pinnacle Silver and Gold Corp.
Executive Summary
  • Pinnacle Silver and Gold Corp. released results from the second round of scoping metallurgical tests at its El Potrero project in Durango, Mexico.
  • Seven samples from three historic mines (Dos de Mayo, Estrella, Capulin) yielded head grades averaging 7.7 g/t Au and 116 g/t Ag.
  • Gold recoveries improved to 97.4%–97.8%, while silver recoveries increased to 64.7%–80.5%.
  • Mineralogical analysis confirmed fine-grained electrum and silver minerals, requiring a target grind of 80% passing 270 mesh (61–63 microns).
  • Gravity separation tests proved unnecessary, as direct cyanide leaching delivered superior overall recoveries, simplifying the future plant flow sheet and reducing projected capital expenditures.
  • Reagent consumption (NaCN/CaO) fell within expected ranges across all veins.
  • Dissolution kinetics showed gold reaching 90–92% recovery within 24 hours, while silver continued improving up to 96 hours.
  • Next steps involve solid-liquid separation testing to guide filtration for dry-stack tailings impoundment and water recycling.
Material Impact
  • The results are a direct follow-up to the first round of metallurgical tests (October 2025) and represent incremental progress toward the company’s stated goal of a formal production decision later in 2026.
  • The elimination of a gravity circuit is a positive operational development, as it streamlines the metallurgical process, reduces equipment costs, and likely lowers plant CapEx.
  • However, the news does not contain new resource estimates, financing announcements, or permitting milestones that would materially shift the company’s valuation or risk profile.
  • The market has already priced in the high-grade nature of the project through previous sampling and LiDAR updates. This update confirms process viability but does not accelerate the timeline or de-risk the project beyond prior expectations.
  • Given the company’s history of incremental updates and the routine nature of metallurgical follow-ups, the impact is positive but incremental.
PINN · Price
Company Overview
  • Pinnacle Silver and Gold Corp. is focused on the El Potrero gold-silver project in Durango, Mexico.
  • The project is a past-producing, low-sulphidation epithermal vein system with three historic mines (Pinos Cuates, Dos de Mayo, La Dura) along a 500-meter strike.
  • Surface tracing extends over 1,600 meters, with additional parallel veins (El Capulin, La Estrella) under evaluation.
  • An existing 100 tpd processing plant from the 1980s remains on site, which the company plans to refurbish for near-term production.
  • The company holds an initial 50% interest upon production commencement, with an option to increase to 100% ownership subject to a 2% NSR.
Read the original news release →

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