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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Chalcocite from
Fields' Copper Mine (Field Mine), Warrenville, Warren Township, Somerset County, New Jersey, USA


Locality type:Mine
Classification
Species:Chalcocite
Formula:Cu2S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcocite data
Locality Data:Click here to view Fields' Copper Mine (Field Mine), Warrenville, Warren Township, Somerset County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:80246
Long-form Identifier:1:3:80246:2
GUID (UUID V4):0
Nearest other occurrences of Chalcocite
3.6km (2.3 miles) ⓘGreen Valley, Middlesex County, New Jersey, USA
4.3km (2.7 miles) ⓘWilson's Quarry (Wilson Stone Co. Quarry), Watchung, Somerset County, New Jersey, USA
7.3km (4.5 miles) ⓘChimney Rock Quarry, Bridgewater Township, Somerset County, New Jersey, USA
10.8km (6.7 miles) ⓘAmerican Mine (Alpha Copper Mine; Bridgewater Mine; Somerville Mine; Somerville deposit), Bridgewater Township, Somerset County, New Jersey, USA
11.6km (7.2 miles) ⓘFeltville Copper mine, Glenside Park (Feltville), Watchung Reservation, Union County, New Jersey, USA
12.2km (7.6 miles) ⓘHoffman Mine, Sunset Lake, Bridgewater Township, Somerset County, New Jersey, USA
13.1km (8.2 miles) ⓘPluckemin Copper Mine, Pluckemin, Bedminster Township, Somerset County, New Jersey, USA
13.1km (8.2 miles) ⓘPluckemin, Bedminster Township, Somerset County, New Jersey, USA
14.6km (9.1 miles) ⓘVoorhees, Franklin Township, Somerset County, New Jersey, USA
16.4km (10.2 miles) ⓘHoudaille Quarry (Summit Quarry; Commonwealth Quarry), Springfield, Springfield Township, Union County, New Jersey, USA
References
Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1). New York Mineralogical Clubp.97
Woodward, Herbert P. (1944) Copper Mines and Mining in New Jersey. Bulletin 57. New Jersey Geological Survey
 
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