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
Burnell Hill Feldspar Quarries, Waterford, Oxford County, Maine, USA


Locality type:Prospect
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 Burnell Hill Feldspar Quarries, Waterford, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:613281
Long-form Identifier:1:3:613281:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.7km (1.0 miles) ⓘBeech Hill Mica Quarry, Waterford, Oxford County, Maine, USA
2.5km (1.5 miles) ⓘSaunders Mica Quarry, Waterford, Oxford County, Maine, USA
3.8km (2.3 miles) ⓘOrman McAllister Quarry, Lovell, Oxford County, Maine, USA
7.0km (4.4 miles) ⓘSouth Waterford Mica prospect (Bear Mountain Prospect), Waterford, Oxford County, Maine, USA
8.3km (5.2 miles) ⓘHarding Hill prospects, Stoneham, Oxford County, Maine, USA
9.4km (5.8 miles) ⓘWardwell Quarry (Pechnic Quarry), Albany, Oxford County, Maine, USA
10.4km (6.4 miles) ⓘWentworth Quarry, Albany, Oxford County, Maine, USA
11.3km (7.0 miles) ⓘVirginia Lake prospect, Stoneham, Oxford County, Maine, USA
12.0km (7.5 miles) ⓘStearns Quarry, Albany, Oxford County, Maine, USA
13.3km (8.2 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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