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


00168260017362175351839.jpg
Calcite

American Mine, Bridgewater Township, Somerset County, New Jersey, USA
00168260017362175351839.jpg
Calcite

American Mine, Bridgewater Township, Somerset County, New Jersey, USA
08589380017362175357788.jpg
Calcite

American Mine, Bridgewater Township, Somerset County, New Jersey, USA
Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Native Copper2
Chrysocolla2
Data
Mineral Data:Click here to view Calcite 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:71007
Long-form Identifier:1:3:71007:3
GUID (UUID V4):0
Nearest other occurrences of Calcite
3.9km (2.4 miles) ⓘPluckemin, Bedminster Township, Somerset County, New Jersey, USA
5.5km (3.4 miles) ⓘChimney Rock Quarry, Bridgewater Township, Somerset County, New Jersey, USA
6.2km (3.8 miles) ⓘChimney Rock (Geographical feature), Bridgewater Township, Somerset County, New Jersey, USA
9.8km (6.1 miles) ⓘMillington Quarry, Bernards Township, Somerset County, New Jersey, USA
10.8km (6.7 miles) ⓘFields' Copper Mine (Field Mine), Warrenville, Warren Township, Somerset County, New Jersey, USA
11.0km (6.9 miles) ⓘFerrante Quarry, Bernardsville, Somerset County, New Jersey, USA
13.1km (8.2 miles) ⓘOldwick Quarry (Stavola Quarry), Tewksbury Township, Hunterdon County, New Jersey, USA
14.6km (9.1 miles) ⓘWilson's Quarry (Wilson Stone Co. Quarry), Watchung, Somerset County, New Jersey, USA
18.4km (11.5 miles) ⓘFanwood Quarry (Weldon Quarry), Watchung, Somerset County, New Jersey, USA
21.1km (13.1 miles) ⓘFeltville Copper mine, Glenside Park (Feltville), Watchung Reservation, Union County, New Jersey, USA
References
Rocks & Min.: 24:27-29.
NJ State Geol. Ann. Rpt. (1902):132
(1906): 148
 
and/or  
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