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
Stearns Quarry, Albany, Oxford County, Maine, USA


Locality type:Quarry
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 Stearns Quarry, Albany, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:613251
Long-form Identifier:1:3:613251:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.7km (1.1 miles) ⓘWentworth Quarry, Albany, Oxford County, Maine, USA
2.6km (1.6 miles) ⓘWardwell Quarry (Pechnic Quarry), Albany, Oxford County, Maine, USA
5.1km (3.1 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
5.1km (3.2 miles) ⓘDouglass Road Metal Quarry, Albany, Oxford County, Maine, USA
5.1km (3.2 miles) ⓘBumpus Quarry, Albany, Oxford County, Maine, USA
5.3km (3.3 miles) ⓘPatch Mountain Beryl prospect, Greenwood, Oxford County, Maine, USA
5.5km (3.4 miles) ⓘTiger Bill Quarries, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
6.0km (3.7 miles) ⓘDunn Quarry, Norway, Oxford County, Maine, USA
6.9km (4.3 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
7.0km (4.3 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
References
Cameron, Eugene N.
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255
King, Vandall - Ed. (2009) Maine Feldspar, Families, and Feuds - Oxford County Mining History. New England Historical Publications.
 
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