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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Feldspar Group from
American Mine (Alpha Copper Mine; Bridgewater Mine; Somerville Mine; Somerville deposit), Bridgewater Township, Somerset County, New Jersey, USA


Locality type:Mine
Classification
Species:'Feldspar Group' (not an IMA approved species)
Colour:Green.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Feldspar Group data
Locality Data:Click here to view American Mine (Alpha Copper Mine; Bridgewater Mine; Somerville Mine; Somerville deposit), Bridgewater Township, Somerset County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:79114
Long-form Identifier:1:3:79114:8
GUID (UUID V4):0
Nearest other occurrences of Feldspar Group
22.1km (13.7 miles) ⓘGriggstown Mine (Franklin Mine), Griggstown, Franklin Township, Somerset County, New Jersey, USA
27.9km (17.3 miles) ⓘCrane Mine, Mount Olive, Mount Olive, Morris County, New Jersey, USA
28.9km (18.0 miles) ⓘDickerson Mine, Mine Hill, Morris County, New Jersey, USA
30.0km (18.6 miles) ⓘByram Mine, Mine Hill, Morris County, New Jersey, USA
30.4km (18.9 miles) ⓘThomas Fanning's Quarry, Dover, Morris County, New Jersey, USA
30.7km (19.0 miles) ⓘSwede's Mine (Sweed's Mine), Rockaway Township, Morris County, New Jersey, USA
30.7km (19.1 miles) ⓘScrub Oaks Mine, Mine Hill, Morris County, New Jersey, USA
31.0km (19.3 miles) ⓘStirling Mine, Irondale, Wharton, Morris County, New Jersey, USA
31.0km (19.3 miles) ⓘI-80 roadcut, Mount Arlington, Morris County, New Jersey, USA
31.2km (19.4 miles) ⓘHubbard Mine, Irondale, Wharton, Morris County, New Jersey, USA
References
The Minerals of NYC & Its Environs, NY Min. Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 35. .
 
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