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
Black Mountain Quarry, Rumford, 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 Black Mountain Quarry, Rumford, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:28653
Long-form Identifier:1:3:28653:0
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
7.5km (4.6 miles) ⓘBell pit, Newry, Oxford County, Maine, USA
7.5km (4.7 miles) ⓘNevel Quarry, Newry, Oxford County, Maine, USA
7.6km (4.7 miles) ⓘCrooker Gem Pegmatite Quarries, Newry, Oxford County, Maine, USA
7.7km (4.8 miles) ⓘDunton Gem Quarry, Newry, Oxford County, Maine, USA
26.5km (16.5 miles) ⓘBemis Stream prospect, D Township, Franklin County, Maine, USA
29.4km (18.3 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
32.8km (20.4 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
32.8km (20.4 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
33.6km (20.9 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
33.6km (20.9 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
References
 
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