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
Bemis Stream prospect, D Township, Franklin County, Maine, USA


Locality type:Prospect
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 Bemis Stream prospect, D Township, Franklin County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:28797
Long-form Identifier:1:3:28797:3
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
26.5km (16.5 miles) ⓘBlack Mountain Quarry, Rumford, Oxford County, Maine, USA
30.2km (18.7 miles) ⓘNevel Quarry, Newry, Oxford County, Maine, USA
30.2km (18.8 miles) ⓘBell pit, Newry, Oxford County, Maine, USA
30.2km (18.8 miles) ⓘCrooker Gem Pegmatite Quarries, Newry, Oxford County, Maine, USA
30.4km (18.9 miles) ⓘDunton Gem Quarry, Newry, Oxford County, Maine, USA
54.9km (34.1 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
58.9km (36.6 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
58.9km (36.6 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
59.7km (37.1 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
59.7km (37.1 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
References
W. B. Thompson, D. L. Joyner, R. G. Woodman, and V. T. King (2005) A Collector's Guide to Maine Mineral Localities. Maine Geological Survey Bulletin 41
 
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