Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Muscovite from
Heikkinen Quarry, Greenwood, Oxford County, Maine, USA


Locality type:Quarry
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Heikkinen Quarry, Greenwood, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:29004
Long-form Identifier:1:3:29004:7
GUID (UUID V4):0
Nearest other occurrences of Muscovite
0.7km (0.5 miles) ⓘOutback prospect (Gross prospect), Greenwood, Oxford County, Maine, USA
0.7km (0.5 miles) ⓘHayes Ledge Quarries (East and West), Greenwood, Oxford County, Maine, USA
0.8km (0.5 miles) ⓘMustonen Ledge prospect, Greenwood, Oxford County, Maine, USA
1.0km (0.6 miles) ⓘWitt Hill Chrysoberyl locality, Greenwood, Oxford County, Maine, USA
1.1km (0.7 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
1.1km (0.7 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
1.6km (1.0 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
1.7km (1.1 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
1.8km (1.1 miles) ⓘNubble Quarry, Greenwood, Oxford County, Maine, USA
2.0km (1.3 miles) ⓘOhtonen Quarry, Greenwood, Oxford County, Maine, USA
References
Thompson, Woodrow B., Joyner, Ronald L., Woodman, Raymond G., King, Vandall T. (1998) Bulletin (41), A Collector's Guide to Maine Mineral Localities (3rd ed.) Maine Geological Survey
 
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