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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Oligoclase from
Forest of Dean Mine, Fort Montgomery, Town of Highlands, Orange County, New York, USA


Locality type:Mine
Classification
Species:Albite var: Oligoclase
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Oligoclase data
Locality Data:Click here to view Forest of Dean Mine, Fort Montgomery, Town of Highlands, Orange County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:79592
Long-form Identifier:1:3:79592:2
GUID (UUID V4):0
Nearest other occurrences of Oligoclase
6.2km (3.8 miles) ⓘAnthony's Nose, Cortlandt Township, Westchester County, New York, USA
7.9km (4.9 miles) ⓘPhilips Mine (Philips Pyrite Mine; Anthony's Nose Pyrrhotite Mine), Town of Philipstown, Putnam County, New York, USA
11.0km (6.9 miles) ⓘGreenwood mine (Patterson mine), Town of Tuxedo, Orange County, New York, USA
12.0km (7.4 miles) ⓘVillage of Monroe, Town of Monroe, Orange County, New York, USA
13.7km (8.5 miles) ⓘClove Mine (Wilks Mine), Village of Monroe, Town of Monroe, Orange County, New York, USA
13.9km (8.6 miles) ⓘO'Neil Mine, Lake Mombasha, Town of Monroe, Orange County, New York, USA
14.5km (9.0 miles) ⓘCrugers Emery Mine, Montrose, Cortlandt Township, Westchester County, New York, USA
31.3km (19.5 miles) ⓘClover Hill Mine, Croton Falls, Somers Township, Westchester County, New York, USA
31.8km (19.8 miles) ⓘKornerupine Group locality, Ringwood, Passaic County, New Jersey, USA
34.1km (21.2 miles) ⓘTilly Foster Iron Mine, Town of Southeast, Putnam 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.72
 
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