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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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Microcline from
Square Pit (Consolidated #4 Quarry), Topsham, Sagadahoc County, Maine, USA


08017280017361020594084.jpg
Microcline

Square Pit, Topsham, Sagadahoc County, Maine, USA
08017280017361020594084.jpg
Microcline

Square Pit, Topsham, Sagadahoc County, Maine, USA
08017280017361020594084.jpg
Microcline

Square Pit, Topsham, Sagadahoc County, Maine, USA
Locality type:Pit
Classification
Species:Microcline
Formula:K(AlSi3O8)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Muscovite2
Beryl1
Molybdenite1
Almandine1
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Square Pit (Consolidated #4 Quarry), Topsham, Sagadahoc County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:29667
Long-form Identifier:1:3:29667:0
GUID (UUID V4):0
Nearest other occurrences of Microcline
0.1km (0.1 miles) ⓘWilliam Willes #1 Quarry, Topsham, Sagadahoc County, Maine, USA
0.6km (0.4 miles) ⓘStaples Quarry, Topsham, Sagadahoc County, Maine, USA
0.7km (0.5 miles) ⓘMallet Quarry, Topsham, Sagadahoc County, Maine, USA
0.8km (0.5 miles) ⓘFisher Quarry, Topsham, Sagadahoc County, Maine, USA
1.0km (0.6 miles) ⓘTrenton Quarry, Topsham, Sagadahoc County, Maine, USA
1.1km (0.7 miles) ⓘGiven #2 Quarry, Topsham, Sagadahoc County, Maine, USA
1.8km (1.1 miles) ⓘTwin Pits Quarry, Cathance River Nature Preserve, Topsham, Sagadahoc County, Maine, USA
1.8km (1.1 miles) ⓘIngalls Quarry, Topsham, Sagadahoc County, Maine, USA
1.9km (1.2 miles) ⓘHavey #1 & #2 Quarries, Topsham, Sagadahoc County, Maine, USA
1.9km (1.2 miles) ⓘSwamp #1 Quarry, Cathance River Nature Preserve, Topsham, Sagadahoc County, Maine, USA
References
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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