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
Fritz Island Mines, Cumru Township, Berks 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 Fritz Island Mines, Cumru Township, Berks County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:489337
Long-form Identifier:1:3:489337:0
GUID (UUID V4):0
Nearest other occurrences of Pyrite
7.0km (4.3 miles) ⓘDyer Quarry, Gibraltar, Birdsboro, Berks County, Pennsylvania, USA
7.2km (4.5 miles) ⓘAntietam Reservoir, Lower Alsace Township, Berks County, Pennsylvania, USA
12.0km (7.4 miles) ⓘOley Valley Quarry (Oley Stone Quarry; Eastern Industries Quarry), Oley Township, Berks County, Pennsylvania, USA
14.0km (8.7 miles) ⓘSilver Hill Quarry, Bowmansville, Brecknock Township, Lancaster County, Pennsylvania, USA
15.4km (9.6 miles) ⓘGrace Mine, Morgantown, Berks County, Pennsylvania, USA
16.2km (10.1 miles) ⓘJones mine, Caernarvon Township, Berks County, Pennsylvania, USA
18.4km (11.4 miles) ⓘHopewell mine, Hopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
18.4km (11.4 miles) ⓘHopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
19.2km (11.9 miles) ⓘMartin Limestone Quarry, East Cocalico Township, Lancaster County, Pennsylvania, USA
20.4km (12.7 miles) ⓘWarwick Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
References
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia 255pp. p.153
 
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