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
Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA


Locality type:Mine
Classification
Species:Albite var: Oligoclase
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
Comments:Found in brown and yellowish masses
Habit:massive
Colour:brown, yellow
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Oligoclase data
Locality Data:Click here to view Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:100226
Long-form Identifier:1:3:100226:3
GUID (UUID V4):0
Nearest other occurrences of Oligoclase
9.1km (5.6 miles) ⓘClover Hill Mine, Croton Falls, Somers Township, Westchester County, New York, USA
15.8km (9.8 miles) ⓘDanburite type locality, Danbury, Fairfield County, Connecticut, USA
23.4km (14.5 miles) ⓘFillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
27.6km (17.1 miles) ⓘPhilips Mine (Philips Pyrite Mine; Anthony's Nose Pyrrhotite Mine), Town of Philipstown, Putnam County, New York, USA
29.3km (18.2 miles) ⓘCrugers Emery Mine, Montrose, Cortlandt Township, Westchester County, New York, USA
29.9km (18.6 miles) ⓘAnthony's Nose, Cortlandt Township, Westchester County, New York, USA
34.1km (21.2 miles) ⓘForest of Dean Mine, Fort Montgomery, Town of Highlands, Orange County, New York, USA
36.9km (22.9 miles) ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
37.1km (23.1 miles) ⓘCorporate Drive, Long Hill, Trumbull, Fairfield County, Connecticut, USA
37.3km (23.1 miles) ⓘOld Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
References
(Januzzi, 1966, 1989) (Trainer, 1938).
Jensen (1978) Minerals of New York State, 42-43
 
and/or  
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