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
Harrison, Westchester County, New York, USA


Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Harrison, Westchester County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:79649
Long-form Identifier:1:3:79649:9
GUID (UUID V4):0
Localities for Biotite in this Region
Lake Street Quarry, Harrison, Westchester County, New York, USA
Nearest other occurrences of Biotite
0.0km (0.0 miles) ⓘLake Street Quarry, Harrison, Westchester County, New York, USA
5.3km (3.3 miles) ⓘLarchmont, Mamaroneck, Westchester County, New York, USA
7.8km (4.8 miles) ⓘVoorhis Quarry, Greenwich, Fairfield County, Connecticut, USA
12.1km (7.5 miles) ⓘValhalla, Mount Pleasant, Westchester County, New York, USA
21.0km (13.0 miles) ⓘTubby Hook occurrences, Manhattan (New York County), New York City, New York, USA
25.4km (15.8 miles) ⓘBaylis Quarry (Bayliss Quarry), Bedford, Westchester County, New York, USA
26.6km (16.5 miles) ⓘKinkel Quarry, Bedford, Westchester County, New York, USA
27.1km (16.8 miles) ⓘBedford, Westchester County, New York, USA
28.4km (17.7 miles) ⓘNew York - Susquehanna & Western Railroad tunnel, Edgewater, Bergen County, New Jersey, USA
29.6km (18.4 miles) ⓘ82nd Street & Central Park West, Manhattan (New York County), New York City, 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.76
 
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