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
Mase Mountain, Tierneys Corner, Jefferson Township, Morris County, New Jersey, USA


Locality type:Mountain
Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Mase Mountain, Tierneys Corner, Jefferson Township, Morris County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:99466
Long-form Identifier:1:3:99466:6
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
14.0km (8.7 miles) ⓘCopper Mine shaft, Edison Mine, Sparta Township, Sussex County, New Jersey, USA
15.3km (9.5 miles) ⓘSterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA
23.1km (14.3 miles) ⓘHamburg Mountain, Hardyston Township, Sussex County, New Jersey, USA
25.5km (15.8 miles) ⓘShiloh, Frelinghuysen Township, Jenny Jump Mountain, Warren County, New Jersey, USA
28.9km (18.0 miles) ⓘPochuck Mountain, McAfee, Vernon Township, Sussex County, New Jersey, USA
33.9km (21.1 miles) ⓘHoit Mine, White Township, Warren County, New Jersey, USA
55.0km (34.2 miles) ⓘVillage of Monroe, Town of Monroe, Orange County, New York, USA
55.2km (34.3 miles) ⓘWorld Trade Center Site, Manhattan (New York County), New York City, New York, USA
65.7km (40.8 miles) ⓘCrugers Emery Mine, Montrose, Cortlandt Township, Westchester County, New York, USA
68.0km (42.2 miles) ⓘPeekskill, Westchester County, New York, USA
References
library.iem.ac.ru (1999) http://library.iem.ac.ru/can-min/vol33/cm6/young.html
 
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