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Black Mountain Quarry (Black Mountain pegmatite), Rumford, Oxford Co., Maine, USA

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Granite pegmatite. Oxford field.

Primarily a mica quarry with four closely spaced nearly overlapping pits. Noted for its mineral specimen variety and for opaque pink toumaline fans in quartz and lepidolite matrix, some of which have been over 50 cm long. No tourmaline pockets have been found at this location to date, although occasional fraudulently labeled transparent rubellite specimens have been strongly promoted as "definitely one-of-a-kind" by their sellers. Locally, these are derisively attributed to "Maine-nibia", "Main-estan", or "Maine-zil".The eosphorite from this locality was formerly the world record size (37 mm).

Not to be confused with the 'Black Mountain locality' (http://www.mindat.org/loc-6537.html).


Mindat Articles

Weird Times at Black Mountain Quarry, Rumford, Maine by Douglas Watts


Mineral List



75 entries listed. 56 valid minerals. 1 (TL) - type locality of valid minerals. 6 erroneous literature entries.

The above list contains all mineral locality references listed on mindat.org. 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 mindat.org 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.

References

Rocks & Minerals (1927): 2: 6.

Maillot, E. E., Boos, M. F., and Mosier, M. (1949). Investigation of Black Mountain beryl deposit, Oxford County, Maine: U. S. Bureau of Mines, Report of Investigations 4412.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 969.

Guidebook 1 to Mineral Collecting in the Maine Pegmatite Belt
Prepared by members of the Maine Federation Club 1973 pg. 22

Rocks & Minerals (1988): 63: 129-130.

Dyar, M.D., Guidotti, C.V., Core, D.P., Wearn, K.M., Wise, M.A., Francis, C.A., Johnson, K., Brady, J.B., Robertson, J.D., and Cross, L.R. (1999) Stable isotope and crystal chemistry of tourmaline across pegmatite-country rocks boundaries at Black Mountain and Mount Mica, southwestern Maine, USA. European Journal of Mineralogy: 11: 281-294.

Moore, P. B., 2000, Analyses of Primary Phosphates from Pegmatites in Maine and Other Localities, in V. T. King (editor), Mineralogy of Maine. Mining History, Gems, and Geology, Maine Geological Survey, Augusta, Maine, p. 333-336.

Wise, Michael A.; Brown, Cathleen D. (2011): Chemical composition of coexisting columbite-group minerals and cassiterite from the Black Mountain pegmatite, Maine. Eur. J. Mineral. 23, 817-828.



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