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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Opal from
A2 Highway tunnel (Falkenberg tunnel), Wölfnitz, Klagenfurt am Wörthersee, Carinthia, Austria


Locality type:Tunnel
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view A2 Highway tunnel (Falkenberg tunnel), Wölfnitz, Klagenfurt am Wörthersee, Carinthia, Austria
Data Identifiers
Mindat Occurrence Record ID:989804
Long-form Identifier:1:3:989804:2
GUID (UUID V4):0
Nearest other occurrences of Opal
4.1km (2.6 miles) ⓘA2 Highway tunnel, Ehrentaler Berg, Klagenfurt am Wörthersee, Carinthia, Austria
25.3km (15.7 miles) ⓘKumberg (Komberg), Zauchen, Villach, Carinthia, Austria
35.9km (22.3 miles) ⓘHaidnerhöhe, Flattnitz, Sankt Veit an der Glan District, Carinthia, Austria
45.7km (28.4 miles) ⓘFeldspar quarry, Laas, Fresach, Villach-Land District, Carinthia, Austria
46.6km (29.0 miles) ⓘBasalt quarry, Kollnitz, Sankt Paul im Lavanttal, Wolfsberg District, Carinthia, Austria
52.5km (32.6 miles) ⓘMagnesite Mine, Millstätter Alpe, Millstatt, Spittal an der Drau District, Carinthia, Austria
56.7km (35.2 miles) ⓘSchwarzenberg quarry (Katsch quarry), Katsch an der Mur, Teufenbach-Katsch, Murau District, Styria, Austria
60.7km (37.7 miles) ⓘSpodumene prospect, Brandrücken, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria
64.0km (39.8 miles) ⓘFuchskogel, Glashütten, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
65.8km (40.9 miles) ⓘPolanz quarry (Mauthnereck), Krumbach, Sankt Oswald ob Eibiswald, Eibiswald, Deutschlandsberg District, Styria, Austria
References
Niedermayr, G.; Praetzel, I. (1995) Mineralien Kärntens. Naturwissenschaftlicher Verein für Kärnten. 232 pp.
 
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