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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Biotite from
Behring Mine (Bering Mine), Sloatsburg, Town of Ramapo, Rockland County, New York, USA


Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Comments:Described as coarse.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Behring Mine (Bering Mine), Sloatsburg, Town of Ramapo, Rockland County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:84502
Long-form Identifier:1:3:84502:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.4km (0.9 miles) ⓘMoorhead Mine (Morehead Mine), Sloatsburg, Town of Ramapo, Rockland County, New York, USA
6.1km (3.8 miles) ⓘUpper California Mine, Sterling Mines group, Sterling Lake, Town of Warwick, Orange County, New York, USA
6.7km (4.2 miles) ⓘLake Mine, Sterling Lake, Town of Warwick, Orange County, New York, USA
8.4km (5.2 miles) ⓘKornerupine Group locality, Ringwood, Passaic County, New Jersey, USA
10.7km (6.6 miles) ⓘHogencamp Mine, Town of Tuxedo, Orange County, New York, USA
10.9km (6.8 miles) ⓘBarnes Mine, Harriman State Park, Rockland County, New York, USA
11.8km (7.3 miles) ⓘStonetown, Ringwood, Passaic County, New Jersey, USA
12.6km (7.8 miles) ⓘGreenwood Furnace, Arden (Greenwood), Orange County, New York, USA
13.0km (8.1 miles) ⓘO'Neil Mine, Lake Mombasha, Town of Monroe, Orange County, New York, USA
13.1km (8.1 miles) ⓘMica Mine, Town of Monroe, Orange County, New York, USA
References
Clarke, John M. (1921, September) The Magnetite Iron Deposits of Southeastern New York. New York State Museum Bulletin Vol. 249-250. The University of the State of New Yorkp.89
 
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