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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Pyrolusite from
Spring Mill Iron Ore pits, Whitemarsh Township, Montgomery County, Pennsylvania, USA


Locality type:Ore Deposit
Classification
Species:Pyrolusite
Formula:Mn4+O2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Spring Mill Iron Ore pits, Whitemarsh Township, Montgomery County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:1782992
Long-form Identifier:1:3:1782992:6
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
3.5km (2.2 miles) ⓘD.O. Hitner's Mine, Whitemarsh Township, Montgomery County, Pennsylvania, USA
7.5km (4.6 miles) ⓘOreland, Springfield Township, Montgomery County, Pennsylvania, USA
9.8km (6.1 miles) ⓘEdge Hill Iron Company Mine, Springfield Township, Montgomery County, Pennsylvania, USA
32.0km (19.9 miles) ⓘKibblehouse Quarry, Perkiomenville, Marlborough Township, Montgomery County, Pennsylvania, USA
32.6km (20.2 miles) ⓘOsborne Hill, Birmingham Township, Chester County, Pennsylvania, USA
53.7km (33.4 miles) ⓘFriedensville Mine, Friedensville, Upper Saucon Township, Lehigh County, Pennsylvania, USA
57.4km (35.7 miles) ⓘMountainville, Salisbury Township, Lehigh County, Pennsylvania, USA
70.6km (43.8 miles) ⓘUnnamed manganese mines, Clinton Township, Hunterdon County, New Jersey, USA
71.3km (44.3 miles) ⓘSherrer Quarry, C.K. Williams Quarry complex, Chestnut Hill, Easton, Northampton County, Pennsylvania, USA
71.7km (44.6 miles) ⓘChestnut Hill, Easton, Northampton County, Pennsylvania, USA
References
Sloto, Ronald (2019) The Mines and Minerals of Montgomery County, Pennsylvania. (Self-published).p.279
 
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