14 January 2025

Draft CIM Leading Practice Guidelines for the Reporting of Diamond Exploration Results, Resources and Reserves, Specific to Primary Diamond Deposits available for industry comment

The CIM Mineral Resource and Mineral Reserve (MRMR) Committee develops and defines the standards, leading practices and guidelines that are intended to foster greater standardization of reporting within the public domain, specifically under NI 43-101. These standards provide a benchmark for both companies and Qualified Persons in discharging their responsibilities. CIM MRMR’s mandate includes maintaining and updating of the standards and guidelines, including the CIM Leading Practice Guidelines for the Reporting of Diamond Exploration Results, Resources and Reserves, and to undertake a program of industry and CIM member consultation prior to submitting updates to CIM Council for approval.

This guideline will supersede the CIM Guidelines for the Reporting of Diamond Exploration Results (2003) and the CIM Best Practice Guidelines for the Estimation of Mineral Resources and Mineral Reserves for Rock Hosted Diamonds (2008). 

The CIM Leading Practice Guidelines for the Reporting of Diamond Exploration Results, Resources and Reserves reflect the current views of leading practices in respect to diamond price estimation and the preparation of mineral resource and mineral reserve estimates for diamond deposits.

The CIM MRMR Committee is circulating a draft of the proposed changes and updates to the CIM Leading Practice Guidelines for the Reporting of Diamond Exploration Results, Resources and Reserves and is soliciting public review and comment. Copies of the draft version of the proposed updated document in PDF format are available here for downloading and review.

Interested parties are invited to submit comments and suggestions using an Excel template by Friday, March 7, 2025.

How to submit detailed comments:

Comments via the Excel template are preferred to manage the large number of comments; however, if you are having significant challenges with the template, please submit your comments via the General Comment box below or in the PDF version.

Please note that you need Microsoft Excel installed on your computer in order to proceed.

1. Click on this link: CIM Guidelines for the Reporting of Diamond Exploration Results, Resources and Reserves Comments Sheet
2. Go to File > Save As > Download to download a copy to your computer.  
3. Open the Excel file that has been saved to your computer.
4. Each worksheet in the Excel file corresponds to a section of the document. Please ensure you click through all the worksheets.
5. Each paragraph of the document has a number, which appears in Column A. This number corresponds to the paragraph number in the PDF version of document, which you can download below. The text of the document is in Column B. Please do not make any changes to Column B. Instead, enter your comments in Column C. Also note that space has been provided at the end of every worksheet for additional comments.
6. When you are ready to submit your comments, please complete this online form and add the Excel file as an attachment.

Please view or download the draft document in PDF format to see the appendices and view the document in published form.

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