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
Wartgesberg, Strohn, Daun, Vulkaneifel, Rhineland-Palatinate, 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 Wartgesberg, Strohn, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
Data Identifiers
Mindat Occurrence Record ID:85227
Long-form Identifier:1:3:85227:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
8.7km (5.4 miles) ⓘAltburg, Schalkenmehren, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
10.2km (6.3 miles) ⓘEmmelberg, Üdersdorf, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
10.5km (6.5 miles) ⓘLöhley, Üdersdorf, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
11.5km (7.1 miles) ⓘMosenberg, Bettenfeld, Wittlich-Land, Bernkastel-Wittlich, Rhineland-Palatinate, Germany
11.9km (7.4 miles) ⓘFirmerich, Daun, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
13.5km (8.4 miles) ⓘHummerich, Utzerath, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
14.8km (9.2 miles) ⓘKahlenberg, Oberstadtfeld, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
15.5km (9.6 miles) ⓘNerother Kopf, Neunkirchen, Daun, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
18.8km (11.7 miles) ⓘEselsberg, Dockweiler, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
19.0km (11.8 miles) ⓘHangelberg quarry, Hinterweiler, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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