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
Haveri mine, Viljakkala, Ylöjärvi, Pirkanmaa, Finland


Locality type:Mine
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 Haveri mine, Viljakkala, Ylöjärvi, Pirkanmaa, Finland
Data Identifiers
Mindat Occurrence Record ID:70130
Long-form Identifier:1:3:70130:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
30.9km (19.2 miles) ⓘNiemikylä granite quarries, Kuru, Ylöjärvi, Pirkanmaa, Finland
35.6km (22.1 miles) ⓘVatanen, Pirkkala, Pirkanmaa, Finland
56.8km (35.3 miles) ⓘVenesjärvi, Kankaanpää, Satakunta, Finland
65.1km (40.5 miles) ⓘEräpyhä pegmatite, Eräjärvi area, Orivesi, Pirkanmaa, Finland
69.3km (43.1 miles) ⓘKatila, Eräjärvi area, Orivesi, Pirkanmaa, Finland
69.6km (43.2 miles) ⓘKaapelinkulma, Valkeakoski, Pirkanmaa, Finland
76.4km (47.5 miles) ⓘViitaniemi pegmatite, Eräjärvi area, Orivesi, Pirkanmaa, Finland
76.5km (47.6 miles) ⓘKauhajärvi, Kauhajoki, South Ostrobothnia, Finland
82.8km (51.5 miles) ⓘNappikallio, Kalvola, Hämeenlinna, Kanta-Häme, Finland
96.0km (59.6 miles) ⓘHaapaluoma pegmatite, Peräseinäjoki, Seinäjoki, South Ostrobothnia, Finland
References
Eilu, Pasi (2003) Exploration for orogenic gold deposits. Fennoscandian Exploration and Mining. Rovaniemi.
Placencia-Gómez, Edmundo, Parviainen, Annika, Hokkanen, Tero, Loukola-Ruskeeniemi, Kirsti (2010) Integrated geophysical and geochemical study on AMD generation at the Haveri Au–Cu mine tailings, SW Finland. Environmental Earth Sciences, 61 (7). 1435-1447 doi:10.1007/s12665-010-0459-9
 
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