# Ridgestone Releases Maiden Mineral Resource Estimate at Guadalupe y Calvo, Mexico

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/ridgestone-releases-maiden-mineral-resource-estimate-at-guadalupe-y-calvo-mexico--75fdeefe-0ab0-4fe9-821b-d46bdf31f018

Original source: https://money.tmx.com/en/quote/RMI/news/4948415461906805/ridgestone-releases-maiden-mineral-resource-estimate-at-guadalupe-y-calvo-mexico

Publisher: tmx

Original announcement: 2021-05-10T20:33:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Ridgestone Mining Inc.

- Ticker: RMI

- Exchange: TSX

- Region: Chihuahua, Mexico

- Primary commodity: Gold

- Secondary commodities: Silver

- Document categories: Resource update

- Extracted: 2026-08-26 07:06:16 UTC

Narrative sentiment: 0.60 · Bullish

## Minestarters Atlas summary

Ridgestone Mining has announced its maiden NI 43-101 Mineral Resource Estimate for the Guadalupe y Calvo gold-silver project in Mexico. The estimate includes approximately 6.43 Mt of Indicated and 3.07 Mt of Inferred resources, totaling roughly 815,000 ounces of gold-equivalent.

Reasoning: The announcement of a maiden NI 43-101 resource estimate is a major milestone, though the high proportion of Inferred material \(approx 48% of total tonnes\) limits immediate economic confidence.

- Positive factor: Maiden resource establishment

- Positive factor: Significant gold-equivalent ounces

- Positive factor: QP sign-off provided

- Negative factor: 100% Inferred component in some segments

- Negative factor: High proportion of Inferred resource

Facts used in scoring: 6

## Classification and evidence

**Maiden Resource**

Polarity: neutral

Definition: First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component.

Why it applies: The announcement explicitly states this is a maiden NI 43-101 Mineral Resource Estimate.

Evidence · text

> announce a maiden National Instrument 43-101 \(NI 43-101\) Mineral Resource Estimate

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: The estimate complies with NI 43-101 and was prepared by an independent QP.

Evidence · text

> complies with National Instrument 43-101 \("NI 43-101"\)

**QP/CP Signed**

Polarity: positive

Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience.

Why it applies: Marc Jutras, P.Eng., is named as the independent Qualified Person who reviewed and approved the release.

Evidence · text

> prepared by Mr. Marc Jutras of Ginto Consulting Inc. \("Ginto"\), an independent Qualified Person

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: The release specifies cut-off grades for both in-pit and underground scenarios.

Evidence · text

> at a cut-off grade of 0.27 g/t AuEq in-pit and 1.33 g/t AuEq underground

## Extracted facts

Stored fact records: 6. Some facts used in scoring do not have a stored record.

## Resource Estimates (6)

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/ridgestone-releases-maiden-mineral-resource-estimate-at-guadalupe-y-calvo-mexico--75fdeefe-0ab0-4fe9-821b-d46bdf31f018#fact-resource-facts-0)

silver

#### Identity

- Commodity: silver
- Ticker: RMI

#### Resource Data

- Category: indicated
- Tonnes: 6427444
- Grade: 50.5
- Grade Unit: g/t
- Contained Metal: 10435243
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2021-05-10T00:00:00.000Z

Reasoning: Indicated silver grade of 50.5 g/t is solid for a polymetallic system.

Evidence · table

> 50.5

Context: 6,427,444

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/ridgestone-releases-maiden-mineral-resource-estimate-at-guadalupe-y-calvo-mexico--75fdeefe-0ab0-4fe9-821b-d46bdf31f018#fact-resource-facts-1)

gold

#### Identity

- Commodity: gold
- Ticker: RMI

#### Resource Data

- Category: indicated
- Tonnes: 6427444
- Grade: 1.05
- Grade Unit: g/t
- Contained Metal: 216866
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2021-05-10T00:00:00.000Z

Reasoning: Indicated gold grade of 1.05 g/t provides a solid base for the resource.

Evidence · table

> 1.05

Context: 6,427,444

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/ridgestone-releases-maiden-mineral-resource-estimate-at-guadalupe-y-calvo-mexico--75fdeefe-0ab0-4fe9-821b-d46bdf31f018#fact-resource-facts-2)

gold

#### Identity

- Commodity: gold
- Ticker: RMI

#### Resource Data

- Category: indicated
- Tonnes: 6427444
- Grade: 1.72
- Grade Unit: g/t AuEq

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2021-05-10T00:00:00.000Z

Reasoning: Indicated gold-equivalent grade of 1.72 g/t AuEq.

Evidence · table

> 1.72

Context: 6,427,444

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/ridgestone-releases-maiden-mineral-resource-estimate-at-guadalupe-y-calvo-mexico--75fdeefe-0ab0-4fe9-821b-d46bdf31f018#fact-resource-facts-3)

silver

#### Identity

- Commodity: silver
- Ticker: RMI

#### Resource Data

- Category: inferred
- Tonnes: 3074146
- Grade: 94.2
- Grade Unit: g/t
- Contained Metal: 9313410
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2021-05-10T00:00:00.000Z

Reasoning: High silver grade in the inferred category.

Evidence · table

> 94.2

Context: 3,074,146

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/ridgestone-releases-maiden-mineral-resource-estimate-at-guadalupe-y-calvo-mexico--75fdeefe-0ab0-4fe9-821b-d46bdf31f018#fact-resource-facts-4)

gold

#### Identity

- Commodity: gold
- Ticker: RMI

#### Resource Data

- Category: inferred
- Tonnes: 3074146
- Grade: 3.4
- Grade Unit: g/t
- Contained Metal: 335618
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2021-05-10T00:00:00.000Z

Reasoning: Strong gold grade in the inferred category.

Evidence · table

> 3.40

Context: 3,074,146

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/ridgestone-releases-maiden-mineral-resource-estimate-at-guadalupe-y-calvo-mexico--75fdeefe-0ab0-4fe9-821b-d46bdf31f018#fact-resource-facts-5)

gold

#### Identity

- Commodity: gold
- Ticker: RMI

#### Resource Data

- Category: inferred
- Tonnes: 3074146
- Grade: 4.65
- Grade Unit: g/t AuEq

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2021-05-10T00:00:00.000Z

Reasoning: High gold-equivalent grade in the inferred category.

Evidence · table

> 4.65

Context: 3,074,146

## 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.