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
Peabody Mountain Quarry (Nason Quarry), Batchelders Grant, 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 Peabody Mountain Quarry (Nason Quarry), Batchelders Grant, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:33199
Long-form Identifier:1:3:33199:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.2km (0.7 miles) ⓘPeabody Mountain Quarry, Batchelders Grant, Oxford County, Maine, USA
5.1km (3.2 miles) ⓘPeaked Hill Quarry, Gilead, Oxford County, Maine, USA
8.0km (5.0 miles) ⓘShirley Brook Topaz locality, Stoneham, Oxford County, Maine, USA
11.3km (7.0 miles) ⓘDonahue Quarry (Donahue Prospect), Albany, Oxford County, Maine, USA
11.4km (7.1 miles) ⓘBeryllonite locality, Sugarloaf Mountain, Stoneham, Oxford County, Maine, USA
12.8km (7.9 miles) ⓘPalmer Mountain locality, Stoneham, Oxford County, Maine, USA
12.8km (8.0 miles) ⓘVirginia Lake prospect, Stoneham, Oxford County, Maine, USA
13.1km (8.1 miles) ⓘSongo Pond Quarry (Kimball Ledge Quarry), Albany, Oxford County, Maine, USA
13.6km (8.5 miles) ⓘCole Quarry, Stoneham, Oxford County, Maine, USA
13.9km (8.6 miles) ⓘShell Pond Brook locality, Stow, 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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