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
Basalt works, Triebendorf, Wiesau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany


Locality type:Workings
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 Basalt works, Triebendorf, Wiesau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
Data Identifiers
Mindat Occurrence Record ID:101562
Long-form Identifier:1:3:101562:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.7km (2.3 miles) ⓘGroßer Teichelberg (Teichelberg; Teichlberg), Pechbrunn, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
11.5km (7.1 miles) ⓘBayerland mine, Pfaffenreuth, Leonberg, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
12.6km (7.8 miles) ⓘOberbaumühle Quarry, Oberbaumühle, Windischeschenbach, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
13.0km (8.1 miles) ⓘKTB borehole (KTB pilot hole), Windischeschenbach, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
16.3km (10.1 miles) ⓘMaier feldspar mine, Püllersreuth, Kirchendemenreuth, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
16.5km (10.3 miles) ⓘPlößberg-Wildenau pegmatite, Plößberg, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
16.6km (10.3 miles) ⓘLindner Mine, Plößberg-Wildenau pegmatite, Plößberg, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
19.4km (12.1 miles) ⓘWilma Mine, Wendersreuth, Kirchendemenreuth, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
20.5km (12.7 miles) ⓘAhornberg, Bärnau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
23.5km (14.6 miles) ⓘDyleň, Stará Voda, Cheb District, Karlovy Vary Region, Czech Republic
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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