# GR Silver Reports Successful Metallurgical Test Work Results for the Bulk Sampling Test Mining Program at Plomosas Project Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf Original source: https://money.tmx.com/en/quote/GRSL/news/7700361486325413/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli Publisher: tmx Original announcement: 2026-02-05T11:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: GR Silver Mining Ltd. - Ticker: GRSL - Exchange: TSX - Region: Mexico - Primary commodity: Silver - Secondary commodities: Gold, Lead, Zinc, Copper - Document categories: Metallurgy - Extracted: 2026-09-16 03:07:49 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary GR Silver has reported positive metallurgical test work results for the Plomosas Project in Mexico, supporting the design of a pilot plant. The studies, conducted at SGM and SGS laboratories, confirmed high silver and gold recoveries into lead and zinc concentrates with no significant deleterious elements identified. Reasoning: Successful metallurgical test work demonstrating high recoveries for silver and gold into lead concentrates, supporting pilot plant design for the Plomosas Project. - Positive factor: High precious metal recoveries in rougher concentrate - Positive factor: Successful cleaner test work improving gold recovery - Positive factor: Concentrates within commercial specifications - Positive factor: No deleterious elements or penalties noted - Positive factor: QA/QC procedures and QP sign-off disclosed - Negative factor: Bench-scale tests only \(open circuit flotation\) Facts used in scoring: 8 ## 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 and silver recoveries in the lead concentrate are high \(74% and 86% respectively\). Evidence · text > Silver and gold recoveries have been developed by the Qualified Person for use in a Preliminary Economic Assessment to be 74% and 86%, respectively. **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: The release details specific QA/QC procedures including blanks, duplicates, and standards. Evidence · text > The Company has implemented QA/QC procedures, which include the insertion of blank, duplicate, and standard samples **Bench Scale Only** Polarity: negative Definition: Only preliminary bench tests completed — no locked-cycle or pilot work. Why it applies: The test work was described as bench-scale open circuit flotation tests. Evidence · text > The tests conducted were bench-scale open circuit flotation tests. **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: the document describes a flotation route \("flotation"\) **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) ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf#fact-metallurgical-facts-0) Plomosas Project · silver #### Identity - Project: Plomosas Project - Commodity: silver - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: flotation - Sample: SGS composite feed sample #### Recovery - Head Grade: 109 - Head Grade Unit: g/t #### Lab - Laboratory: SGS Mexico #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: High-grade silver feed grade confirmed in composite sample. Evidence · table > 109 Context: SGS #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf#fact-metallurgical-facts-1) Plomosas Project · gold #### Identity - Project: Plomosas Project - Commodity: gold - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: flotation - Sample: SGS composite feed sample #### Recovery - Head Grade: 2.69 - Head Grade Unit: g/t #### Lab - Laboratory: SGS Mexico #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: High-grade gold feed grade confirmed in composite sample. Evidence · table > 2.69 Context: SGS #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf#fact-metallurgical-facts-2) Plomosas Project · silver #### Identity - Project: Plomosas Project - Commodity: silver - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: flotation - Sample: SGM composite feed sample #### Recovery - Head Grade: 105 - Head Grade Unit: g/t #### Lab - Laboratory: SGM #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: High-grade silver feed grade confirmed in composite sample. Evidence · table > 105 Context: SGM #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf#fact-metallurgical-facts-3) Plomosas Project · gold #### Identity - Project: Plomosas Project - Commodity: gold - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: flotation - Sample: SGM composite feed sample #### Recovery - Head Grade: 2.7 - Head Grade Unit: g/t #### Lab - Laboratory: SGM #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: High-grade gold feed grade confirmed in composite sample. Evidence · table > 2.70 Context: SGM #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf#fact-metallurgical-facts-4) Plomosas Project · silver #### Identity - Project: Plomosas Project - Commodity: silver - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: flotation - Sample: Lead Rougher Concentrate #### Recovery - Recovery: 71.5 % - Recovery Basis: actual\_test - Head Grade: 721 - Head Grade Unit: g/t #### Lab - Laboratory: SGM #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: Strong silver recovery reported in rougher stage. - Positive factor: High silver recovery into lead concentrate Evidence · table > 721 Context: 10.06 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 71.5% is below the weak band \(75%\) ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf#fact-metallurgical-facts-5) Plomosas Project · gold #### Identity - Project: Plomosas Project - Commodity: gold - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: flotation - Sample: Lead Rougher Concentrate #### Recovery - Recovery: 77.9 % - Recovery Basis: actual\_test - Head Grade: 16 - Head Grade Unit: g/t #### Lab - Laboratory: SGM #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: Strong gold recovery reported in rougher stage. - Positive factor: High gold recovery into lead concentrate Evidence · table > 16 Context: 10.06 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 77.9% is below the weak band \(80%\) ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf#fact-metallurgical-facts-6) Plomosas Project · gold #### Identity - Project: Plomosas Project - Commodity: gold - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: flotation - Sample: Lead Concentrate \(Cleaner\) #### Recovery - Recovery: 86 % - Recovery Basis: actual\_test - Head Grade: 22.75 - Head Grade Unit: g/t #### Lab - Laboratory: SGM #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: Cleaner stage significantly improves gold recovery. - Positive factor: Successful increase in gold recovery vs 2021 test work Evidence · table > 22.75 Context: 5.5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-reports-successful-metallurgical-test-work-results-for-the-bulk-sampli--720351ab-e2c7-46ff-8362-649fc54a9baf#fact-metallurgical-facts-7) Plomosas Project · silver #### Identity - Project: Plomosas Project - Commodity: silver - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: flotation - Sample: Lead Concentrate \(Cleaner\) #### Recovery - Recovery: 74 % - Recovery Basis: actual\_test - Head Grade: 839 - Head Grade Unit: g/t #### Lab - Laboratory: SGM #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: High silver grade and recovery in cleaner stage. - Positive factor: High silver recovery in cleaner concentrate Evidence · table > 839 Context: 5.5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 74% is below the weak band \(75%\) ## 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.