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Canton Lead Mines (Cherry Brook lead mine), Rattlesnake Mountain, Canton, Hartford Co., Connecticut, USA

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Latitude & Longitude (WGS84): 41° 50' 10'' North , 72° 54' 47'' West
Latitude & Longitude (decimal): 41.8361111111, -72.9130555556

A hydrothermal fault vein deposit, probably related to Mesozoic rifting. Very little has been written about this old locality, most references give only the briefest mention. Minor amounts of galena, sphalerite, and lead secondary minerals occur. The locality is most famous for its amethyst, which occurs lining cavities in breccia and varies from larger lavender, mottled and translucent crystals to smaller, clearer, deeply colored druses. Colorless and milky quartz also occurs.

Mineral List

7 valid minerals.

The above list 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. (1837), Report on the Geological Survey of Connecticut.

Schairer, John F. (1931), Minerals of Connecticut. State Geological and Natural History Survey of Connecticut Bulletin 51.

Schooner, Richard. (1961), The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.

Hiller, John, Jr. (1971), Connecticut Mines and Minerals. Privately published.

White, John, and Cook, Robert. (1990), Amethyst Occurrences of the Eastern United States. Mineralogical Record: 21(3): 203-213.

Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 399.

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