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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Stevensite from
Stewart Hartshorn Quarry (Hartshorn Quarry), Millburn, Millburn, Essex County, New Jersey, USA


Locality type:Quarry
Classification
Species:Stevensite
Formula:(Ca,Na)xMg3-x(Si4O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stevensite data
Locality Data:Click here to view Stewart Hartshorn Quarry (Hartshorn Quarry), Millburn, Millburn, Essex County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:80194
Long-form Identifier:1:3:80194:0
GUID (UUID V4):0
Nearest other occurrences of Stevensite
4.0km (2.5 miles) ⓘHartshorn Quarry, Short Hills, Millburn, Essex County, New Jersey, USA
12.5km (7.7 miles) ⓘF.J. Marley Quarry, Verona, Essex County, New Jersey, USA
18.7km (11.6 miles) ⓘLaurel Hill, Secaucus, Hudson County, New Jersey, USA
18.9km (11.8 miles) ⓘFrancisco Brothers Quarry, Great Notch, Little Falls Township, Passaic County, New Jersey, USA
23.0km (14.3 miles) ⓘLower New Street Quarry, Paterson, Passaic County, New Jersey, USA
23.2km (14.4 miles) ⓘUpper New Street Quarry, Paterson, Passaic County, New Jersey, USA
24.9km (15.5 miles) ⓘInterstate 80 roadcut, Paterson, Passaic County, New Jersey, USA
26.6km (16.5 miles) ⓘWoodcliff, North Bergen, Hudson County, New Jersey, USA
27.1km (16.8 miles) ⓘProspect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
31.5km (19.6 miles) ⓘInterstate 95 and George Washington Bridge Lower Level roadcut, Fort Lee, Bergen 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.93
 
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