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
Dunton Gem Quarry, Newry, 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 Dunton Gem Quarry, Newry, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:28296
Long-form Identifier:1:3:28296:9
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
0.2km (0.1 miles) ⓘCrooker Gem Pegmatite Quarries, Newry, Oxford County, Maine, USA
0.2km (0.1 miles) ⓘBell pit, Newry, Oxford County, Maine, USA
0.3km (0.2 miles) ⓘNevel Quarry, Newry, Oxford County, Maine, USA
7.7km (4.8 miles) ⓘBlack Mountain Quarry, Rumford, Oxford County, Maine, USA
24.5km (15.2 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
28.8km (17.9 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
28.8km (17.9 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
29.6km (18.4 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
29.6km (18.4 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
30.4km (18.9 miles) ⓘBemis Stream prospect, D Township, Franklin County, Maine, USA
References
King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey.
King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey.
 
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