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

Photo: Dick Dionne
Latitude: 44°35'7"N
Longitude: 70°38'47"W
 
 
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

Albite
var: Cleavelandite
var: Zygadite
Almandine
Amblygonite
Autunite
Beryl
Beryllonite
'Biotite'
Cassiterite
Columbite-(Fe)
Columbite-(Mn)
Cookeite
'Dahllite'
Dickinsonite-(KMnNa)
Dravite
Elbaite
Eosphorite
Fairfieldite
Fluorapatite
var: Carbonate-rich Fluorapatite
Goyazite
Greifensteinite
'Gummite'
Heterosite
Hurlbutite
Hydroxylapatite
Hydroxylherderite
Kosnarite (TL)
Laueite
Lepidolite
Magnetite
'Manganese Oxides'
Meta-autunite
Metatorbernite
Microcline
Microlite Group
Mitridatite
Montebrasite
Montmorillonite
Muscovite
Olenite
Opal
var: Opal-AN

Phosphuranylite
Pollucite
Purpurite
Pyrite
Quartz
Reddingite
Rhodochrosite
Rockbridgeite
Romanèchite
Roscherite
Rossmanite
Schorl
Siderite
Sphalerite
Spodumene
Strunzite
Tantalite-(Mn)
Titanite
Todorokite
Torbernite
'Tourmaline
var: Indicolite'

'var: Rubellite'
'var: Verdelite'
Triphylite
Uraninite
Uranophane
Vivianite
Whitlockite
Wodginite
Zircon


73 entries listed. 56 valid minerals. 1 type locality (valid mineral). 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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