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
Keim's Mine, French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA


Locality type:Mine
Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Keim's Mine, French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:84580
Long-form Identifier:1:3:84580:1
GUID (UUID V4):0
Nearest other occurrences of Pyrite
0.0km (0.0 miles) ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
5.3km (3.3 miles) ⓘWarwick Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
7.2km (4.5 miles) ⓘHopewell mine, Hopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
7.2km (4.5 miles) ⓘHopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
11.3km (7.0 miles) ⓘJones mine, Caernarvon Township, Berks County, Pennsylvania, USA
12.2km (7.6 miles) ⓘKeystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, USA
13.0km (8.1 miles) ⓘBenjamin Franklin Mine, Chester Springs, West Pikeland Township, Chester County, Pennsylvania, USA
13.9km (8.7 miles) ⓘGrace Mine, Morgantown, Berks County, Pennsylvania, USA
15.3km (9.5 miles) ⓘDyer Quarry, Gibraltar, Birdsboro, Berks County, Pennsylvania, USA
17.6km (10.9 miles) ⓘBlack Rock Tunnel (Conrail Tunnel), Phoenixville, Chester County, Pennsylvania, USA
References
Dana 6: 446, 1068.
 
and/or  
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