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
Cole Quarry, Stoneham, 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 Cole Quarry, Stoneham, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:31707
Long-form Identifier:1:3:31707:0
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
2.7km (1.7 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
22.1km (13.7 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
25.1km (15.6 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
25.1km (15.6 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
25.1km (15.6 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
25.2km (15.7 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
26.3km (16.3 miles) ⓘB.B. No. 7 Quarry, Norway, Oxford County, Maine, USA
37.5km (23.3 miles) ⓘDunton Gem Quarry, Newry, Oxford County, Maine, USA
37.6km (23.4 miles) ⓘCrooker Gem Pegmatite Quarries, Newry, Oxford County, Maine, USA
37.7km (23.4 miles) ⓘBell pit, Newry, 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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