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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Feldspar Group from
Schlossberg tunnel, Kapfenberg, Bruck-Mürzzuschlag District, Styria, Austria


Locality type:Processing Plant
Classification
Species:'Feldspar Group' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Feldspar Group data
Locality Data:Click here to view Schlossberg tunnel, Kapfenberg, Bruck-Mürzzuschlag District, Styria, Austria
Data Identifiers
Mindat Occurrence Record ID:1982921
Long-form Identifier:1:3:1982921:2
GUID (UUID V4):0
Nearest other occurrences of Feldspar Group
12.7km (7.9 miles) ⓘS35 motorway tunnel (Mixnitz tunnel), Mixnitz, Pernegg an der Mur, Bruck-Mürzzuschlag District, Styria, Austria
21.8km (13.5 miles) ⓘRabenstein, Frohnleiten, Graz-Umgebung District, Styria, Austria
24.1km (15.0 miles) ⓘWegscheidkreuz, Freßnitzgraben, Krieglach, Bruck-Mürzzuschlag District, Styria, Austria
28.6km (17.8 miles) ⓘQuartzite quarry (Steinbruch Rohrdorfer; Tanzer quarry), Falkenstein, Fischbach, Weiz District, Styria, Austria
29.6km (18.4 miles) ⓘPegmatite outcrops, Sankt Radegund bei Graz, Graz-Umgebung District, Styria, Austria
32.5km (20.2 miles) ⓘKoglhof pegmatites, Birkfeld, Weiz District, Styria, Austria
40.0km (24.9 miles) ⓘKaltenegg, Southern District, Prinzkogel mines, Prinzkogel (Prinzenkogel), Rettenegg, Weiz District, Styria, Austria
41.6km (25.9 miles) ⓘHasen valley, Fröschnitz valley (Fröschnitz), Steinhaus am Semmering, Spital am Semmering, Bruck-Mürzzuschlag District, Styria, Austria
42.2km (26.2 miles) ⓘArzberg am Semmering mines, Hasen valley, Fröschnitz valley (Fröschnitz), Steinhaus am Semmering, Spital am Semmering, Bruck-Mürzzuschlag District, Styria, Austria
47.3km (29.4 miles) ⓘWöllmissberg (Wölmisberg; Wöllmissbach), Sankt Martin am Wöllmißberg, Voitsberg District, Styria, Austria
References
Auer, C. (2026): 2400) Almandin, Amphibol, Analcim, Aragonit, Baryt, Calcit, Chalkopyrit, Chlorit, Dolomit, Feldspat, Ferrierit-(Mg), Gips, Graphit, Muskovit, Natrojarosit, Pyrit, Pyrrhotin, Quarz (Bergkristall), Sphalerit sowie Turmalin vom Schlossbergstollen bei Kapfenberg, Bezirk Bruck an der Mur, Steiermark. Pp. 484-487 in Walter, F. et al. (2026): Neue Mineralfunde aus Österreich LXXV. Carinthia II, 216./136., 397-506.
 
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