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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Sillimanite from
Pochuck Mountain, McAfee, Vernon Township, Sussex County, New Jersey, USA


Locality type:Mountain
Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Comments:Occurs in gneiss.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Pochuck Mountain, McAfee, Vernon Township, Sussex County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:79766
Long-form Identifier:1:3:79766:5
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
5.9km (3.6 miles) ⓘHamburg Mountain, Hardyston Township, Sussex County, New Jersey, USA
14.9km (9.3 miles) ⓘSterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA
14.9km (9.3 miles) ⓘCopper Mine shaft, Edison Mine, Sparta Township, Sussex County, New Jersey, USA
28.9km (18.0 miles) ⓘMase Mountain, Tierneys Corner, Jefferson Township, Morris County, New Jersey, USA
31.6km (19.6 miles) ⓘVillage of Monroe, Town of Monroe, Orange County, New York, USA
44.0km (27.3 miles) ⓘShiloh, Frelinghuysen Township, Jenny Jump Mountain, Warren County, New Jersey, USA
50.1km (31.1 miles) ⓘCrugers Emery Mine, Montrose, Cortlandt Township, Westchester County, New York, USA
50.8km (31.6 miles) ⓘPeekskill, Westchester County, New York, USA
55.6km (34.5 miles) ⓘHoit Mine, White Township, Warren County, New Jersey, USA
60.1km (37.4 miles) ⓘYorktown, Westchester County, New York, 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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