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
Beech Hill Mica Quarry, Waterford, 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 Beech Hill Mica Quarry, Waterford, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:36366
Long-form Identifier:1:3:36366:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.1km (0.7 miles) ⓘSaunders Mica Quarry, Waterford, Oxford County, Maine, USA
1.7km (1.0 miles) ⓘBurnell Hill Feldspar Quarries, Waterford, Oxford County, Maine, USA
5.1km (3.2 miles) ⓘOrman McAllister Quarry, Lovell, Oxford County, Maine, USA
6.1km (3.8 miles) ⓘSouth Waterford Mica prospect (Bear Mountain Prospect), Waterford, Oxford County, Maine, USA
8.3km (5.2 miles) ⓘWardwell Quarry (Pechnic Quarry), Albany, Oxford County, Maine, USA
8.8km (5.4 miles) ⓘHarding Hill prospects, Stoneham, Oxford County, Maine, USA
9.3km (5.8 miles) ⓘWentworth Quarry, Albany, Oxford County, Maine, USA
10.9km (6.7 miles) ⓘStearns Quarry, Albany, Oxford County, Maine, USA
11.7km (7.2 miles) ⓘVirginia Lake prospect, Stoneham, Oxford County, Maine, USA
11.7km (7.3 miles) ⓘDunn Quarry, Norway, Oxford County, Maine, USA
References
King, Vandall - Ed. (2009) Maine Feldspar, Families, and Feuds - Oxford County Mining History. New England Historical Publications.
 
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