# 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 Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621 Original source: https://money.tmx.com/en/quote/PINN/news/6897958970440698/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic Publisher: tmx Original announcement: 2026-06-02T11:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Pinnacle Silver and Gold Corp. - Ticker: PINN - Exchange: TSX - Region: Durango, Mexico - Primary commodity: Gold - Secondary commodities: Silver - Document categories: Metallurgy - Extracted: 2026-09-12 18:38:07 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Pinnacle Silver and Gold Corp. reported successful second-round scoping metallurgical tests at the El Potrero project in Mexico. Results showed exceptional gold recoveries averaging 97.8% for the Dos de Mayo vein via bottle roll leaching, while silver recoveries were more variable due to complex mineralogy. Reasoning: Second round of scoping tests confirms very high gold recoveries \(97.8%\) and robust head grades, though silver mineralogy is more complex. - Positive factor: High gold recoveries \(>97%\) - Positive factor: Free-milling characteristics \(electrum\) - Positive factor: Low deleterious elements - Positive factor: Small grain size suggests predictable grind requirements - Negative factor: Silver recovery is variable and lower than gold - Negative factor: Gravity circuit showed no benefit and actually penalized silver recovery Facts used in scoring: 8 ## Classification and evidence **Free Milling** Polarity: positive Definition: Simple, clean ore amenable to standard processing without oxidation. Why it applies: Gold detected as electrum and high recoveries suggest simple metallurgy. Evidence · text > Gold in the form of electrum, a natural Au-Ag alloy, was detected in all seven samples. **Bench Scale Only** Polarity: negative Definition: Only preliminary bench tests completed — no locked-cycle or pilot work. Why it applies: Tests were bottle roll and gravity tests on 1kg/25kg samples, which are bench-scale. Evidence · text > The bottle roll test was performed in a 2-gallon Nalgene bottle, using 1,000 g of sample **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: the document describes a mill\_cil route \("concentrator"\) **Gravity Route** Polarity: neutral Definition: Gravity separation forms a material part of the flowsheet. Why it applies: the document describes a gravity route \("gravity"\) **Multi-Domain Tested** Polarity: positive Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed. Why it applies: 3 distinct composites were tested ## Extracted facts Stored fact records: 8. Some facts used in scoring do not have a stored record. ## Metallurgical Results (8) ### bottle roll [Link to this fact](https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621#fact-metallurgical-facts-0) El Potrero · gold #### Identity - Project: El Potrero - Commodity: gold - Region: mexico - Reported Region: Durango, Mexico - Ticker: PINN #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: Dos de Mayo vein composite \(5 samples\), 53 micron grind - Grind P80: 53 µm #### Recovery - Recovery: 97.83 % - Recovery Basis: actual\_test #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: 97.83% recovery is exceptional for a preliminary scoping test. - Positive factor: Exceptional gold recovery Evidence · text > the five-sample composite from the bottle roll cyanide leach tests... resulted in a gold recovery of 97.83% #### Tags used in scoring **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 97.83% is at or above the exceptional band \(95%\) ### bottle roll [Link to this fact](https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621#fact-metallurgical-facts-1) El Potrero · silver #### Identity - Project: El Potrero - Commodity: silver - Region: mexico - Reported Region: Durango, Mexico - Ticker: PINN #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: Dos de Mayo vein composite \(5 samples\), 53 micron grind - Grind P80: 53 µm #### Recovery - Recovery: 70.02 % - Recovery Basis: actual\_test #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: Silver recovery is moderate and shows complexity compared to gold. - Positive factor: Improved recoveries compared to previous rounds - Negative factor: Variable and lower than gold Evidence · text > a silver recovery of 70.02% #### Tags used in scoring **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 70.02% is below the weak band \(75%\) ### bottle roll [Link to this fact](https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621#fact-metallurgical-facts-2) El Potrero · gold #### Identity - Project: El Potrero - Commodity: gold - Region: mexico - Reported Region: Durango, Mexico - Ticker: PINN #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: Dos de Mayo vein composite \(5 samples\), 75 micron grind - Grind P80: 75 µm #### Recovery - Recovery: 96.79 % - Recovery Basis: actual\_test #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: High recovery even at a coarser grind. - Positive factor: High gold recovery Evidence · text > resulted in gold and silver recoveries of 96.79% and 66.38%, respectively #### Tags used in scoring **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 96.79% is at or above the exceptional band \(95%\) ### bottle roll [Link to this fact](https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621#fact-metallurgical-facts-3) El Potrero · silver #### Identity - Project: El Potrero - Commodity: silver - Region: mexico - Reported Region: Durango, Mexico - Ticker: PINN #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: Dos de Mayo vein composite \(5 samples\), 75 micron grind - Grind P80: 75 µm #### Recovery - Recovery: 66.38 % - Recovery Basis: actual\_test #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: Silver recovery is lower at 75 microns compared to 53 microns. - Negative factor: Lower recovery at coarser grind Evidence · text > resulted in gold and silver recoveries of 96.79% and 66.38%, respectively #### Tags used in scoring **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 66.38% is below the weak band \(75%\) ### bottle roll [Link to this fact](https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621#fact-metallurgical-facts-4) El Potrero · gold #### Identity - Project: El Potrero - Commodity: gold - Region: mexico - Reported Region: Durango, Mexico - Ticker: PINN #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: La Estrella vein sample #### Recovery - Recovery: 97.6 % - Recovery Basis: actual\_test #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: Consistent high gold recovery across different veins. - Positive factor: High gold recovery Evidence · text > gold recoveries of 97.6%... were obtained for the Estrella... veins #### Tags used in scoring **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 97.6% is at or above the exceptional band \(95%\) ### bottle roll [Link to this fact](https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621#fact-metallurgical-facts-5) El Potrero · silver #### Identity - Project: El Potrero - Commodity: silver - Region: mexico - Reported Region: Durango, Mexico - Ticker: PINN #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: La Estrella vein sample #### Recovery - Recovery: 64.7 % - Recovery Basis: actual\_test #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: Silver recovery is lower and more variable than gold. - Negative factor: Variable silver recovery Evidence · text > silver recoveries were more variable, at... 64.7%... for La Estrella #### Tags used in scoring **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 64.7% is below the weak band \(75%\) ### bottle roll [Link to this fact](https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621#fact-metallurgical-facts-6) El Potrero · gold #### Identity - Project: El Potrero - Commodity: gold - Region: mexico - Reported Region: Durango, Mexico - Ticker: PINN #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: El Capulin vein sample #### Recovery - Recovery: 97.4 % - Recovery Basis: actual\_test #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: Consistent high gold recovery. - Positive factor: High gold recovery Evidence · text > gold recoveries of... 97.4% were obtained for the... Capulin... veins #### Tags used in scoring **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 97.4% is at or above the exceptional band \(95%\) ### bottle roll [Link to this fact](https://atlas-extractions.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--fefa841c-0fc4-4af4-855e-b04118ee8621#fact-metallurgical-facts-7) El Potrero · silver #### Identity - Project: El Potrero - Commodity: silver - Region: mexico - Reported Region: Durango, Mexico - Ticker: PINN #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: El Capulin vein sample #### Recovery - Recovery: 80.5 % - Recovery Basis: actual\_test #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: Silver recovery in El Capulin is better than in the other tested veins. - Positive factor: Relatively high silver recovery compared to other veins Evidence · text > silver recoveries... at... 80.5%, respectively, reflecting the more complex silver mineralogy ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.