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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Montmorillonite from
Aldrian quarry (Hofstatt quarry), Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria


07091270017367665007100.jpg
Montmorillonite, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
07091270017367665007100.jpg
Montmorillonite, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
04442490017272732666037.jpg
Montmorillonite, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
Locality type:Quarry
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Dolomite1
Quartz1
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view Aldrian quarry (Hofstatt quarry), Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
Data Identifiers
Mindat Occurrence Record ID:306758
Long-form Identifier:1:3:306758:1
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
9.1km (5.7 miles) ⓘRemšnik mine, Podvelka, Slovenia
32.1km (20.0 miles) ⓘSpodumene prospect, Brandrücken, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria
36.1km (22.4 miles) ⓘBasalt quarry, Kollnitz, Sankt Paul im Lavanttal, Wolfsberg District, Carinthia, Austria
43.7km (27.1 miles) ⓘA2 Highway cut, Packsattel, Preitenegg, Wolfsberg District, Carinthia, Austria
44.7km (27.8 miles) ⓘHematite Mine, Waldenstein, Wolfsberg, Wolfsberg District, Carinthia, Austria
50.4km (31.3 miles) ⓘStradner Kogel, Wilhelmsdorf, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
50.8km (31.6 miles) ⓘBasalt quarry, Klöch, Südoststeiermark District, Styria, Austria
51.1km (31.8 miles) ⓘBorehole St W2, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
51.5km (32.0 miles) ⓘSchlarbaum quarry, Klausen, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
51.8km (32.2 miles) ⓘPlatte, Mariatrost, Graz, Styria, Austria
References
Taucher, J. & Postl, W. (1992)
 
and/or  
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