# Stuhini Reports Strong Metallurgical Recoveries from Surface Mini-Bulk Sample at Silver Surprise Zone, Ruby Creek Project Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/stuhini-reports-strong-metallurgical-recoveries-from-surface-mini-bulk-sample-at--dc4c2df0-9ee1-478b-bbe6-84e8c8f8bfc6 Original source: https://money.tmx.com/en/quote/NOVA/news/8595922364166604/stuhini-reports-strong-metallurgical-recoveries-from-surface-mini-bulk-sample-at Publisher: tmx Original announcement: 2025-12-01T13:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Stuhini Exploration Ltd. - Ticker: STU - Exchange: TSX - Region: British Columbia - Primary commodity: Silver - Secondary commodities: Molybdenum - Document categories: Metallurgy - Extracted: 2026-09-14 15:16:26 UTC Narrative sentiment: 0.90 · Bullish ## Minestarters Atlas summary Stuhini Exploration has reported highly favourable metallurgical results from a 719 kg surface mini-bulk sample at the Silver Surprise Zone of the Ruby Creek Project. Direct smelting achieved a 95% silver recovery from a 4,200 g/t silver feed, while gravity separation successfully produced a refined silver bar. Reasoning: The results demonstrate exceptionally high silver recovery \(95%\) from an ultra-high-grade surface sample using a low-complexity smelting route, significantly de-risking the processing of the Silver Surprise Zone. - Positive factor: High silver recovery \(95%\) via simple direct smelting - Positive factor: Very high head grade \(4,200 g/t Ag\) - Positive factor: Simple, low-complexity processing route identified - Positive factor: Gravity separation successfully produced a refined silver bar - Negative factor: Test scale is a mini-bulk sample \(719 kg\), which may not be fully representative of the deposit Facts used in scoring: 3 ## Classification and evidence **Free Milling** Polarity: positive Definition: Simple, clean ore amenable to standard processing without oxidation. Why it applies: The release notes that the high native silver content and simple mineralogy make it well-suited to low-complexity processing. Evidence · text > The high native silver content and simple quartz-hosted mineralogy make the mineralization particularly well-suited to this low-complexity processing route. **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: The sample was processed using a Denver ball mill. Evidence · text > The sample was milled in a 3' x 3' Denver ball mill **Gravity Route** Polarity: neutral Definition: Gravity separation forms a material part of the flowsheet. Why it applies: the document describes a gravity route \("gravity"\) **Single Domain Only** Polarity: negative Definition: Testing limited to one composite or domain — representativeness not established. Why it applies: only one composite was tested ## Extracted facts Stored fact records: 3. Some facts used in scoring do not have a stored record. ## Metallurgical Results (3) ### direct smelting [Link to this fact](https://atlas-extractions.minestarters.com/news/stuhini-reports-strong-metallurgical-recoveries-from-surface-mini-bulk-sample-at--dc4c2df0-9ee1-478b-bbe6-84e8c8f8bfc6#fact-metallurgical-facts-0) Ruby Creek Project · silver #### Identity - Project: Ruby Creek Project - Commodity: silver - Region: canada\_bc - Reported Region: British Columbia - Ticker: STU #### Test Work - Program Status: preliminary - Test Type: direct smelting - Processing Route: direct smelting - Sample: 719 kg surface mini-bulk sample from Silver Surprise Zone #### Recovery - Recovery: 95 % - Recovery Basis: actual\_test - Head Grade: 4200 - Head Grade Unit: g/t #### Lab - Consultant: Rino Mihoc of Ruby Gold Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-12-01T00:00:00.000Z Reasoning: 95% recovery from ultra-high-grade material via direct smelting is a standout outcome. - Positive factor: 95% recovery is exceptional for direct smelting - Negative factor: Small sample size Evidence · text > Direct smelting test achieved 95% silver recovery #### 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: 95% is at or above the exceptional band \(90%\) ### gravity [Link to this fact](https://atlas-extractions.minestarters.com/news/stuhini-reports-strong-metallurgical-recoveries-from-surface-mini-bulk-sample-at--dc4c2df0-9ee1-478b-bbe6-84e8c8f8bfc6#fact-metallurgical-facts-1) Ruby Creek Project · silver #### Identity - Project: Ruby Creek Project - Commodity: silver - Region: canada\_bc - Reported Region: British Columbia - Ticker: STU #### Test Work - Program Status: preliminary - Test Type: gravity - Processing Route: gravity separation using a Gemini shaking table - Sample: 719 kg surface mini-bulk sample from Silver Surprise Zone \(gravity circuit\) #### Recovery - Recovery: 15 % - Recovery Basis: actual\_test - Head Grade: 4200 - Head Grade Unit: g/t - Conc. Grade: 10 - Conc. Grade Unit: % #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-12-01T00:00:00.000Z Reasoning: While gravity recovery is low \(15%\), it successfully concentrated the silver for subsequent smelting and confirmed the presence of free, heavy silver. - Positive factor: Successfully produced a refined silver bar - Positive factor: Simple single-pass process - Negative factor: Low recovery \(15%\) for the gravity circuit alone Evidence · text > Gravity separation using a single pass on a Gemini shaking table recovered 15% of the contained silver #### Tags used in scoring **Gravity Route** Polarity: neutral Definition: Gravity separation forms a material part of the flowsheet. Why it applies: processing\_route matches the gravity signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 15% is below the weak band \(75%\) ### Fact 3 [Link to this fact](https://atlas-extractions.minestarters.com/news/stuhini-reports-strong-metallurgical-recoveries-from-surface-mini-bulk-sample-at--dc4c2df0-9ee1-478b-bbe6-84e8c8f8bfc6#fact-metallurgical-facts-2) Ruby Creek Project · silver #### Identity - Project: Ruby Creek Project - Commodity: silver - Region: canada\_bc - Reported Region: British Columbia - Ticker: STU #### Test Work - Sample: 719 kg surface mini-bulk sample from Silver Surprise Zone \(gravity tailings\) #### Recovery - Head Grade: 4200 - Head Grade Unit: g/t - Tailings Grade: 3540 - Tailings Grade Unit: g/t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-12-01T00:00:00.000Z Reasoning: Tailings grade of 3,540 g/t silver confirms the gravity stage is not efficient for primary recovery, necessitating the smelting route. - Negative factor: High tailings grade indicates significant silver loss in the gravity stage Evidence · text > Tailings after gravity separation assayed 3,540 g/t silver ## 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.