# Star Royalties Highlights Copperstone Development Progress and Exploration Potential Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/star-royalties-highlights-copperstone-development-progress-and-exploration-poten--0b548531-3296-4721-b7c9-c35cfc9fdd90 Original source: https://money.tmx.com/en/quote/STRR/news/8328512708685464/star-royalties-highlights-copperstone-development-progress-and-exploration-poten Publisher: tmx Original announcement: 2025-11-07T12:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Star Royalties Ltd. - Ticker: STRR - Exchange: TSX - Region: Arizona, USA - Primary commodity: Gold - Secondary commodities: Copper - Document categories: Resource update, Economic study, Permitting - Extracted: 2026-09-19 01:15:48 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Star Royalties highlights progress at the Copperstone Gold Mine, where a Preliminary Economic Assessment \(PEA\) shows an after-tax NPV5% of $227 million and an IRR of 171% at $3,000/oz gold. The project features a high-grade M&I resource of 1.2 Mt at 7.7 g/t Au and is being re-interpreted as an IOCG system, suggesting significant expansion potential. Reasoning: The announcement highlights strong economic indicators from a PEA and significant resource scale, alongside a constructive new geological interpretation \(IOCG\) that suggests upside potential. - Positive factor: Robust PEA economics with 171% IRR - Positive factor: High-grade M&I resource \(7.7 g/t Au\) - Positive factor: IOCG geological interpretation suggests expansion potential - Positive factor: Permitting milestones on track for 2026 restart - Negative factor: Project restart depends on pending MPO amendments Facts used in scoring: 3 ## Classification and evidence **High IRR** Polarity: positive Definition: Post-tax real unlevered IRR in the strong tier or better. Why it applies: The PEA reports an after-tax IRR of 171%. Evidence · text > after-tax IRR of 171% **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: The document reports 1.2 Mt at 7.7 g/t gold as Indicated. Evidence · text > 1.2 Mt at 7.7 g/t **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: The document reports 0.97 Mt at 6.3 g/t gold as Inferred. Evidence · text > 0.97 Mt at 6.3 g/t **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The resource and PEA are referenced under NI 43-101 standards. Evidence · text > under National Instrument 43-101 ## Extracted facts Stored fact records: 2. Some facts used in scoring do not have a stored record. ## Resource Estimates (2) ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/star-royalties-highlights-copperstone-development-progress-and-exploration-poten--0b548531-3296-4721-b7c9-c35cfc9fdd90#fact-resource-facts-1) Copperstone · gold #### Identity - Project: Copperstone - Commodity: gold - Region: usa\_az - Reported Region: Arizona, USA - Ticker: STRR #### Resource scope - Estimate type: resource - Effective date: 2025-02-06T00:00:00.000Z - Reporting standards: ni\_43\_101 - Resource group id: resource:913e5d222208fae6763b - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 1200000 - Grade: 7.7 - Grade Unit: g/t - Contained Metal: 300000 - Contained Unit: oz #### Prior Estimate - Resource Date: 2025-02-06 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-11-07T00:00:00.000Z Reasoning: High grade M&I resource reported. - Positive factor: High grade Evidence · text > 300,000 oz of Measured and Indicated resources \(1.2 Mt at 7.7 g/t\) #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/star-royalties-highlights-copperstone-development-progress-and-exploration-poten--0b548531-3296-4721-b7c9-c35cfc9fdd90#fact-resource-facts-2) Copperstone · gold #### Identity - Project: Copperstone - Commodity: gold - Region: usa\_az - Reported Region: Arizona, USA - Ticker: STRR #### Resource scope - Estimate type: resource - Effective date: 2025-02-06T00:00:00.000Z - Reporting standards: ni\_43\_101 - Resource group id: resource:e99a5a3c80bb214216a4 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 970000 - Grade: 6.3 - Grade Unit: g/t - Contained Metal: 197000 - Contained Unit: oz #### Prior Estimate - Resource Date: 2025-02-06 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-11-07T00:00:00.000Z Reasoning: Inferred resource component. - Negative factor: Inferred category Evidence · text > 197,000 oz of Inferred resources \(0.97 Mt at 6.3 g/t\) #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports ## 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.