Ledges in an area south of Rt. 9 in West Cummington?
Porter (1834) describes the discovery of cummingtonite: "Several years since a very curious mineral was discovered at Cummington and at
Plainfield, at both which places it occurs in large quantities. Specimens were sent to the most eminent mineralogists in the country. After a considerable time had elapsed, it was described by professor Dewey, in the eighth volume of the American Journal of Science, under the name of cummingtonite from the place where it was first discovered. 'I have given,' said he, 'this name to a mineral found by Doctor J. Porter in Cummington...With quartz and garnets it forms a large mass in Cummington. The cavities in the rock contain pulverulent sulphur of a dirty greenish color, and minute crystals of magnetic oxyd of iron are also found in it.'"
Mineral List
7 entries listed. 7 valid minerals. 1 type locality (valid mineral).
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References
Dewey (1824), American Journal of Science: vol. 8.
Porter, Jacob (1834). Topographical Description and Historical Sketch of Plainfield, in Hampshire County, Massachusetts. (Greenfield, MA: Thomas Prince).
American Mineralogist (1978): 63: 1023.
American Mineralogist (1989): 74: 1091.
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 58.
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