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
Hibbs Quarry, Mount Rubellite, Hebron, 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 Hibbs Quarry, Mount Rubellite, Hebron, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:658241
Long-form Identifier:1:3:658241:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.2km (1.4 miles) ⓘLittle Singepole Mountain prospects, Paris, Oxford County, Maine, USA
6.3km (3.9 miles) ⓘWestinghouse Quarry, Buckfield, Oxford County, Maine, USA
8.2km (5.1 miles) ⓘHooper Ledge Quarry, Paris, Oxford County, Maine, USA
8.2km (5.1 miles) ⓘMount Mica Quarry, Paris, Oxford County, Maine, USA
8.8km (5.5 miles) ⓘBennett Quarry, Buckfield, Oxford County, Maine, USA
9.9km (6.1 miles) ⓘWhispering Pines Quarry, Paris, Oxford County, Maine, USA
10.3km (6.4 miles) ⓘRyerson Hill Quarries, Paris, Oxford County, Maine, USA
12.2km (7.6 miles) ⓘPhillips Quarry, Minot, Androscoggin County, Maine, USA
16.0km (10.0 miles) ⓘWade Quarry (Androscoggin Tourmaline prospect), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
16.1km (10.0 miles) ⓘPulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
References
USGS Bull 445
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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