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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Montmorillonite from
Mount Mica Quarry, Paris, Oxford County, Maine, USA


Locality type:Quarry
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view Mount Mica Quarry, Paris, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:28217
Long-form Identifier:1:3:28217:2
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
2.9km (1.8 miles) ⓘRyerson Hill Quarries, Paris, Oxford County, Maine, USA
4.5km (2.8 miles) ⓘBennett Quarry, Buckfield, Oxford County, Maine, USA
6.6km (4.1 miles) ⓘMount Marie Quarries, Paris, Oxford County, Maine, USA
12.0km (7.4 miles) ⓘB.B. No. 7 Quarry, Norway, Oxford County, Maine, USA
13.3km (8.3 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
13.4km (8.3 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
13.6km (8.5 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
13.7km (8.5 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
18.6km (11.6 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
24.0km (14.9 miles) ⓘGroves Quarry (Hole in the Ground Quarry), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
References
King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey.
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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