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
Orman McAllister Quarry, Lovell, 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 Orman McAllister Quarry, Lovell, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:35707
Long-form Identifier:1:3:35707:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.8km (2.3 miles) ⓘBurnell Hill Feldspar Quarries, Waterford, Oxford County, Maine, USA
5.1km (3.2 miles) ⓘBeech Hill Mica Quarry, Waterford, Oxford County, Maine, USA
5.3km (3.3 miles) ⓘSaunders Mica Quarry, Waterford, Oxford County, Maine, USA
5.8km (3.6 miles) ⓘHarding Hill prospects, Stoneham, Oxford County, Maine, USA
8.6km (5.3 miles) ⓘVirginia Lake prospect, Stoneham, Oxford County, Maine, USA
10.1km (6.3 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
10.2km (6.3 miles) ⓘWardwell Quarry (Pechnic Quarry), Albany, Oxford County, Maine, USA
10.5km (6.5 miles) ⓘPine Hill Chrysoberyl locality, Lovell, Oxford County, Maine, USA
10.8km (6.7 miles) ⓘSouth Waterford Mica prospect (Bear Mountain Prospect), Waterford, Oxford County, Maine, USA
10.9km (6.8 miles) ⓘBeryllonite locality, Sugarloaf Mountain, Stoneham, Oxford County, Maine, USA
References
King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey.
 
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