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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Stilbite Subgroup from
Gleinalm tunnel, Sankt Michael in Obersteiermark, Leoben District, Styria, Austria


Locality type:Tunnel
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Gleinalm tunnel, Sankt Michael in Obersteiermark, Leoben District, Styria, Austria
Data Identifiers
Mindat Occurrence Record ID:920886
Long-form Identifier:1:3:920886:5
GUID (UUID V4):0
Nearest other occurrences of Stilbite Subgroup
8.7km (5.4 miles) ⓘFuchskogelgraben, Frohnleiten, Graz-Umgebung District, Styria, Austria
11.7km (7.3 miles) ⓘMugel, Niklasdorf, Leoben District, Styria, Austria
19.1km (11.9 miles) ⓘS35 motorway tunnel (Kaltenbach tunnel), Zlatten, Pernegg an der Mur, Bruck-Mürzzuschlag District, Styria, Austria
25.7km (16.0 miles) ⓘS6 motorway tunnel (Tanzenberg tunnel), Tanzenberg, Kapfenberg, Bruck-Mürzzuschlag District, Styria, Austria
35.0km (21.8 miles) ⓘBären valley, Pletzen, Gaal, Murtal District, Styria, Austria
36.0km (22.3 miles) ⓘA2 motorway tunnel (Kalcherkogel tunnel), Kalcherkogel, Packsattel, Preitenegg, Wolfsberg District, Carinthia, Austria
36.1km (22.4 miles) ⓘA2 Highway cut, Packsattel, Preitenegg, Wolfsberg District, Carinthia, Austria
36.8km (22.8 miles) ⓘGroßer Ringkogel, Gaal, Murtal District, Styria, Austria
48.6km (30.2 miles) ⓘSpodumene prospect, Brandrücken, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria
49.0km (30.5 miles) ⓘBasalt quarry, Weitendorf, Wildon, Leibnitz District, Styria, Austria
References
Taucher, J. & Hollerer, C. E. (2015): Über einige Mineralien aus dem Gleinalmtunnel, 2. Röhre, Südvortrieb, Steiermark, Österreich. Der Steirische Mineralog, 29, 44-46.
 
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