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Miller Mine (Keystone Mine; Grenville graphite deposit), Grenville-sur-la-Rouge, Argenteuil RCM, Laurentides, Québec, Canada

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Latitude & Longitude (WGS84): 45° 40' 34'' North , 74° 36' 32'' West
Latitude & Longitude (decimal): 45.6761111111, -74.6088888889
Name(s) in local language(s):, canton de Grenville

The first graphite mine in Canada. Ells (1904) suggests the locality was known before 1845. Locality was probably known in 1837 or 1838. The locality is the co-type locality for lederite, one of the first minerals described that has parting.

Currently being developed by Canada Carbon

Mineral List

9 valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Shepard, Charles Upham (1840) On a Supposed New Mineral Species, American Journal of Science, second series, v. 3-4, p. 357-360.
Ells, R. W. (1904) Bulletin on Graphite, Mineral Resources of Canada, pp. 30.
Sabina, A. (1974) Rocks and Minerals for the Collector Buckingham - Mount Laurier - Grenville, Quebec; Hawkesbury - Ottawa, Ontario, Geological Survey of Canada Paper 68-51, p, 75-77.

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