# 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-staging.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--c1ce85c9-f1d2-488c-a9d8-37368ca0c20e 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: 2026-08-20 22:10:34 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 using bottle roll leach, with head grades averaging 7.7 g/t Au and 116 g/t Ag. Reasoning: Second round of scoping metallurgical tests shows very high gold recoveries \(>97%\) and robust head grades, though silver recovery is more complex and variable. - Positive factor: exceptional gold recoveries - Positive factor: robust head grades - Positive factor: low deleterious elements - Positive factor: QP/CP signed - Negative factor: variable silver recovery - Negative factor: gravity circuit not beneficial Facts used in scoring: 6 ## Classification and evidence **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: Gold recoveries are consistently above 97% for all veins tested. Evidence · text > averaging 97.8% \[gold recovery\] **QA/QC Disclosed** Polarity: positive Story-specific tag Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: Release mentions SGS lab, duplicate assays, and QP/CP sign-off. Evidence · text > Seven mineralized samples were sent to the SGS Lab **Free Milling** Polarity: positive Definition: Simple, clean ore amenable to standard processing without oxidation. Why it applies: Gold in the form of electrum was detected and shows excellent response to direct cyanidation. Evidence · text > This suggests that the ore exhibits an excellent response to cyanidation, particularly for gold. ## Extracted facts Stored fact records: 6. Some facts used in scoring do not have a stored record. ## Metallurgical Results (6) ### bottle roll [Link to this fact](https://atlas-staging.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--c1ce85c9-f1d2-488c-a9d8-37368ca0c20e#fact-metallurgical-facts-0) gold #### Identity - Commodity: gold - Ticker: PINN #### Test Work - Program Status: scoping - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: Dos de Mayo vein composite \(5-sample composite\), 53 micron grind - Grind P80: 53 µm #### Recovery - Recovery: 97.83 % - Recovery Basis: actual\_test #### Reagents - Cyanide: 1.24 kg/t - Lime: 0.8 kg/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: 97.83% gold recovery at 53 microns is exceptional for a scoping-stage bottle roll 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% ### bottle roll [Link to this fact](https://atlas-staging.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--c1ce85c9-f1d2-488c-a9d8-37368ca0c20e#fact-metallurgical-facts-1) silver #### Identity - Commodity: silver - Ticker: PINN #### Test Work - Program Status: scoping - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: Dos de Mayo vein composite \(5-sample composite\), 53 micron grind - Grind P80: 53 µm #### Recovery - Recovery: 70.02 % - Recovery Basis: actual\_test #### Reagents - Cyanide: 1.24 kg/t - Lime: 0.8 kg/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: Silver recovery is moderate and noted as more variable due to complex mineralogy. - Positive factor: improved silver recovery - Negative factor: variable silver recovery Evidence · text > silver recovery of 70.02% ### bottle roll [Link to this fact](https://atlas-staging.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--c1ce85c9-f1d2-488c-a9d8-37368ca0c20e#fact-metallurgical-facts-2) gold #### Identity - Commodity: gold - Ticker: PINN #### Test Work - Program Status: scoping - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: La Estrella vein composite, 75 micron grind - Grind P80: 75 µm #### Recovery - Recovery: 97.6 % - Recovery Basis: actual\_test #### Reagents - Cyanide: 0.79 kg/t - Lime: 0.6 kg/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: 97.6% gold recovery is very strong. - Positive factor: high gold recovery Evidence · text > gold recoveries of 97.6%... for the Estrella... veins ### bottle roll [Link to this fact](https://atlas-staging.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--c1ce85c9-f1d2-488c-a9d8-37368ca0c20e#fact-metallurgical-facts-3) silver #### Identity - Commodity: silver - Ticker: PINN #### Test Work - Program Status: scoping - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: La Estrella vein composite, 75 micron grind - Grind P80: 75 µm #### Recovery - Recovery: 64.7 % - Recovery Basis: actual\_test #### Reagents - Cyanide: 0.79 kg/t - Lime: 0.6 kg/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: 64.7% silver recovery is moderate and reflects complex mineralogy. - Negative factor: moderate silver recovery Evidence · text > silver recoveries were more variable, at... 64.7% for La Estrella ### bottle roll [Link to this fact](https://atlas-staging.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--c1ce85c9-f1d2-488c-a9d8-37368ca0c20e#fact-metallurgical-facts-4) gold #### Identity - Commodity: gold - Ticker: PINN #### Test Work - Program Status: scoping - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: El Capulin vein composite, 75 micron grind - Grind P80: 75 µm #### Recovery - Recovery: 97.4 % - Recovery Basis: actual\_test #### Reagents - Cyanide: 1.09 kg/t - Lime: 0.6 kg/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: 97.4% gold recovery is very strong. - Positive factor: high gold recovery Evidence · text > gold recoveries of... 97.4% were obtained for the... Capulin veins ### bottle roll [Link to this fact](https://atlas-staging.minestarters.com/news/pinnacle-receives-more-positive-results-from-second-round-of-scoping-metallurgic--c1ce85c9-f1d2-488c-a9d8-37368ca0c20e#fact-metallurgical-facts-5) silver #### Identity - Commodity: silver - Ticker: PINN #### Test Work - Program Status: scoping - Test Type: bottle roll - Processing Route: bottle roll cyanide leach - Sample: El Capulin vein composite, 75 micron grind - Grind P80: 75 µm #### Recovery - Recovery: 80.5 % - Recovery Basis: actual\_test #### Reagents - Cyanide: 1.09 kg/t - Lime: 0.6 kg/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-02T00:00:00.000Z Reasoning: 80.5% silver recovery is strong for this vein. - Positive factor: strong silver recovery Evidence · text > silver recoveries... at... 80.5% \[for El Capulin\] ## 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.