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
Palmer Mountain locality, Stoneham, Oxford County, Maine, USA


Locality type:Occurrence
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:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Palmer Mountain locality, Stoneham, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:34101
Long-form Identifier:1:3:34101:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.1km (0.7 miles) ⓘCole Quarry, Stoneham, Oxford County, Maine, USA
2.6km (1.6 miles) ⓘShell Pond Brook locality, Stow, Oxford County, Maine, USA
3.1km (1.9 miles) ⓘIntergalactic Pit, Deer Hill, Stow, Oxford County, Maine, USA
3.1km (1.9 miles) ⓘEastman Quarry, Deer Hill, Stow, Oxford County, Maine, USA
3.1km (1.9 miles) ⓘDeer Hill, Stow, Oxford County, Maine, USA
3.2km (2.0 miles) ⓘBeryllonite locality, Sugarloaf Mountain, Stoneham, Oxford County, Maine, USA
3.6km (2.2 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
3.8km (2.3 miles) ⓘLittle Deer Hill prospect, Stow, Oxford County, Maine, USA
4.3km (2.7 miles) ⓘPine Hill Chrysoberyl locality, Lovell, Oxford County, Maine, USA
5.2km (3.3 miles) ⓘMillard Chandler Mine, Chatham, Carroll County, New Hampshire, USA
References
 
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