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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Marcasite from
Ueberroth Mine, Friedensville, Upper Saucon Township, Lehigh County, Pennsylvania, USA


Locality type:Mine
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Ueberroth Mine, Friedensville, Upper Saucon Township, Lehigh County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:138754
Long-form Identifier:1:3:138754:4
GUID (UUID V4):0
Nearest other occurrences of Marcasite
25.0km (15.5 miles) ⓘSherrer Quarry, C.K. Williams Quarry complex, Chestnut Hill, Easton, Northampton County, Pennsylvania, USA
40.1km (24.9 miles) ⓘOley Valley Quarry (Oley Stone Quarry; Eastern Industries Quarry), Oley Township, Berks County, Pennsylvania, USA
47.3km (29.4 miles) ⓘEcton Mine, Perkiomen Mines, Audubon, Lower Providence Township, Montgomery County, Pennsylvania, USA
48.5km (30.1 miles) ⓘTrap Rock Industries Moores Station Quarry, Moore, Hopewell Township, Mercer County, New Jersey, USA
84.9km (52.7 miles) ⓘVan Horne's pit, New Brunswick, Middlesex County, New Jersey, USA
88.3km (54.9 miles) ⓘBrandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA
89.4km (55.6 miles) ⓘSterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA
89.5km (55.6 miles) ⓘQuigley pit, Sayreville, Middlesex County, New Jersey, USA
89.5km (55.6 miles) ⓘEdgar's pit, Sayreville, Middlesex County, New Jersey, USA
90.3km (56.1 miles) ⓘCornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA
References
Rocks & Min.: 6:26
10:33-36, 58.
 
and/or  
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