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
Wimhof Quarry, Vilshofen, Passau District, Lower Bavaria, Bavaria, Germany


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 Wimhof Quarry, Vilshofen, Passau District, Lower Bavaria, Bavaria, Germany
Data Identifiers
Mindat Occurrence Record ID:336604
Long-form Identifier:1:3:336604:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.0km (1.2 miles) ⓘEinöd Quarry, Vilshofen, Passau District, Lower Bavaria, Bavaria, Germany
2.0km (1.2 miles) ⓘSchweiklberg abbey, Vilshofen, Passau District, Lower Bavaria, Bavaria, Germany
20.6km (12.8 miles) ⓘMiesberg, Hals, Saldenburg, Freyung-Grafenau District, Lower Bavaria, Bavaria, Germany
20.7km (12.9 miles) ⓘHals, Saldenburg, Freyung-Grafenau District, Lower Bavaria, Bavaria, Germany
29.1km (18.1 miles) ⓘSteinerleinbach Quarry, Röhrnbach, Freyung-Grafenau District, Lower Bavaria, Bavaria, Germany
32.1km (19.9 miles) ⓘGrub Quarries, Grub, Rinchnach, Regen District, Lower Bavaria, Bavaria, Germany
33.8km (21.0 miles) ⓘGranite quarry, Allerding, Sankt Florian am Inn, Schärding District, Upper Austria, Austria
38.4km (23.9 miles) ⓘGrögöd Quarry (G'steinert Quarry), Untergriesbach, Passau District, Lower Bavaria, Bavaria, Germany
41.0km (25.5 miles) ⓘBirkhöhe Quarry (Birkenhöhe Quarry), Zwiesel, Regen District, Lower Bavaria, Bavaria, Germany
41.0km (25.5 miles) ⓘSavings bank construction site, Zwiesel, Regen District, Lower Bavaria, Bavaria, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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