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
Greifensteine, Ehrenfriedersdorf, Erzgebirgskreis, Saxony, Germany


Locality type:Outcrop
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 Greifensteine, Ehrenfriedersdorf, Erzgebirgskreis, Saxony, Germany
Data Identifiers
Mindat Occurrence Record ID:95419
Long-form Identifier:1:3:95419:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.4km (2.1 miles) ⓘSauberg Mine, Ehrenfriedersdorf, Erzgebirgskreis, Saxony, Germany
4.6km (2.8 miles) ⓘGeyer SW skarn, Geyer, Erzgebirgskreis, Saxony, Germany
15.8km (9.8 miles) ⓘVater Abraham Mine, Lauta, Marienberg, Erzgebirgskreis, Saxony, Germany
19.2km (11.9 miles) ⓘHabichtsleithe, Aue, Aue-Bad Schlema, Erzgebirgskreis, Saxony, Germany
21.9km (13.6 miles) ⓘSerpentinite quarry, Zöblitz, Marienberg, Erzgebirgskreis, Saxony, Germany
23.1km (14.4 miles) ⓘSatzung, Marienberg, Erzgebirgskreis, Saxony, Germany
23.6km (14.7 miles) ⓘSaidenbach reservoir, Forchheim, Pockau-Lengefeld, Erzgebirgskreis, Saxony, Germany
26.5km (16.4 miles) ⓘPodlesí stock, Potůčky Deposit, Potůčky, Karlovy Vary District, Karlovy Vary Region, Czech Republic
26.6km (16.5 miles) ⓘEclogite outcrop, Forchheim, Pockau-Lengefeld, Erzgebirgskreis, Saxony, Germany
27.0km (16.8 miles) ⓘRatsstein quarry, Hartmannsdorf, Mittelsachsen, Saxony, Germany
References
Wittern, Artur (2001) Mineralfundorte und ihre Minerale in Deutschland (1st ed.) Schweizerbart, Stuttgart.
 
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