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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Pyrite from
Brandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA


Locality type:Quarry
Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Brandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA
Data Identifiers
Mindat Occurrence Record ID:50045
Long-form Identifier:1:3:50045:8
GUID (UUID V4):0
Nearest other occurrences of Pyrite
19.5km (12.1 miles) ⓘHenry Pusey's quarry, Willowdale, East Marlboro Township, Chester County, Pennsylvania, USA
24.3km (15.1 miles) ⓘDeshong's Quarry, Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
32.3km (20.1 miles) ⓘMill Lane Farms (Great Valley Corporate Center), East Whiteland Township, Chester County, Pennsylvania, USA
35.1km (21.8 miles) ⓘOverbrook, Hestonville, Philadelphia County, Pennsylvania, USA
37.0km (23.0 miles) ⓘBenjamin Franklin Mine, Chester Springs, West Pikeland Township, Chester County, Pennsylvania, USA
37.5km (23.3 miles) ⓘBrookdale Mine, Schuylkill Township, Chester County, Pennsylvania, USA
37.9km (23.6 miles) ⓘMontgomery Mine, Schuylkill Township, Chester County, Pennsylvania, USA
38.3km (23.8 miles) ⓘKeystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, USA
39.8km (24.7 miles) ⓘKing of Prussia, Upper Merion Township, Montgomery County, Pennsylvania, USA
39.9km (24.8 miles) ⓘMorris Mine, Schuylkill Township, Chester County, Pennsylvania, USA
References
Rocks & Min.:11:216
21:280-281
AmMin:9(1924):1-5.
 
and/or  
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