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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Gypsum from
Martin's Dock, Edison, Middlesex County, New Jersey, USA


Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Martin's Dock, Edison, Middlesex County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:79760
Long-form Identifier:1:3:79760:1
GUID (UUID V4):0
Nearest other occurrences of Gypsum
16.9km (10.5 miles) ⓘChimney Rock Quarry, Bridgewater Township, Somerset County, New Jersey, USA
23.1km (14.3 miles) ⓘMillington Quarry, Bernards Township, Somerset County, New Jersey, USA
34.3km (21.3 miles) ⓘRiker Hill, Livingston, Livingston, Essex County, New Jersey, USA
38.7km (24.0 miles) ⓘSchuyler Copper Mine, North Arlington, Bergen County, New Jersey, USA
39.3km (24.4 miles) ⓘLaurel Hill, Secaucus, Hudson County, New Jersey, USA
41.6km (25.9 miles) ⓘMcDowell's Quarry (Osborne and Marsellis Quarry), Upper Montclair, Montclair, Essex County, New Jersey, USA
44.5km (27.7 miles) ⓘFrancisco Brothers Quarry, Great Notch, Little Falls Township, Passaic County, New Jersey, USA
44.6km (27.7 miles) ⓘHoudaille Quarry, Little Falls Township, Passaic County, New Jersey, USA
45.7km (28.4 miles) ⓘUnion Building and Construction Quarry, Woodland Park, Passaic County, New Jersey, USA
48.6km (30.2 miles) ⓘLower New Street Quarry, Paterson, Passaic 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.80
 
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