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, 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, Batchelders Grant, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:33698
Long-form Identifier:1:3:33698:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.2km (0.7 miles) ⓘPeabody Mountain Quarry (Nason Quarry), Batchelders Grant, Oxford County, Maine, USA
4.0km (2.5 miles) ⓘPeaked Hill Quarry, Gilead, Oxford County, Maine, USA
8.7km (5.4 miles) ⓘShirley Brook Topaz locality, Stoneham, Oxford County, Maine, USA
11.0km (6.9 miles) ⓘDonahue Quarry (Donahue Prospect), Albany, Oxford County, Maine, USA
12.3km (7.7 miles) ⓘBeryllonite locality, Sugarloaf Mountain, Stoneham, Oxford County, Maine, USA
12.7km (7.9 miles) ⓘSongo Pond Quarry (Kimball Ledge Quarry), Albany, Oxford County, Maine, USA
13.4km (8.3 miles) ⓘVirginia Lake prospect, Stoneham, Oxford County, Maine, USA
13.8km (8.6 miles) ⓘPalmer Mountain locality, Stoneham, Oxford County, Maine, USA
14.4km (9.0 miles) ⓘBumpus Quarry, Albany, Oxford County, Maine, USA
14.5km (9.0 miles) ⓘDouglass Road Metal Quarry, Albany, 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
 
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