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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Opal-AN from
McCoy's Gold Mine, Camp Smith, Peekskill, Westchester County, New York, USA


Locality type:Mine
Classification
Species:Opal var: Opal-AN
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal-AN data
Locality Data:Click here to view McCoy's Gold Mine, Camp Smith, Peekskill, Westchester County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:96559
Long-form Identifier:1:3:96559:4
GUID (UUID V4):0
Nearest other occurrences of Opal-AN
3.1km (1.9 miles) ⓘPhilips Mine (Philips Pyrite Mine; Anthony's Nose Pyrrhotite Mine), Town of Philipstown, Putnam County, New York, USA
4.6km (2.9 miles) ⓘStrang Emery Pit, Toddville, Cortlandt Township, Westchester County, New York, USA
6.9km (4.3 miles) ⓘPhillips ore bed, Town of Putnam Valley, Putnam County, New York, USA
8.8km (5.5 miles) ⓘCroft Mine (Croft Magnetic Iron Mine), Peekskill, Westchester County, New York, USA
27.1km (16.8 miles) ⓘBedford, Westchester County, New York, USA
27.8km (17.3 miles) ⓘConsolidated Feldspar Mining Corporation's plant, Bedford, Westchester County, New York, USA
28.4km (17.6 miles) ⓘBaylis Quarry (Bayliss Quarry), Bedford, Westchester County, New York, USA
29.8km (18.5 miles) ⓘInterstate 84 road cuts, Town of Southeast, Putnam County, New York, USA
33.1km (20.6 miles) ⓘWhite Plains, Westchester County, New York, USA
35.5km (22.0 miles) ⓘCasey Quarry (Ridgefield pegmatite), Ridgefield, Fairfield County, Connecticut, USA
References
Rocks & Min.: 8:40.
 
and/or  
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