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
Basalt quarry, Kollnitz, Sankt Paul im Lavanttal, Wolfsberg District, Carinthia, Austria


Locality type:Quarry
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 Basalt quarry, Kollnitz, Sankt Paul im Lavanttal, Wolfsberg District, Carinthia, Austria
Data Identifiers
Mindat Occurrence Record ID:201013
Long-form Identifier:1:3:201013:7
GUID (UUID V4):0
Nearest other occurrences of Opal
17.6km (10.9 miles) ⓘSpodumene prospect, Brandrücken, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria
18.6km (11.5 miles) ⓘFuchskogel, Glashütten, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
19.6km (12.2 miles) ⓘPolanz quarry (Mauthnereck), Krumbach, Sankt Oswald ob Eibiswald, Eibiswald, Deutschlandsberg District, Styria, Austria
21.2km (13.2 miles) ⓘMüllerbauer, Schwarze Sulm, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
24.2km (15.0 miles) ⓘSchwagbauer (Schwoagbauer), Osterwitz, Deutschlandsberg, Deutschlandsberg District, Styria, Austria
24.9km (15.5 miles) ⓘStoffhütte pegmatite, Deutschlandsberg, Deutschlandsberg District, Styria, Austria
25.0km (15.6 miles) ⓘHartner quarry, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
25.0km (15.6 miles) ⓘRostock creek, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
27.8km (17.3 miles) ⓘLaßnitzgraben, Deutschlandsberg, Deutschlandsberg District, Styria, Austria
36.1km (22.4 miles) ⓘAldrian quarry (Hofstatt quarry), Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
References
Zirkl, Erich Johann; Braitsch, O.; Hofer, F.; Kahler, Erentraud (1962) Neues über den Basalt von Kollnitz im Lavanttal, Kärnten. Tschermaks Mineralogische und Petrographische Mitteilungen, 8 (1). p.96-139. doi:10.1007/bf01128394
Niedermayr, G.; Praetzel, I. (1995) Mineralien Kärntens. Naturwissenschaftlicher Verein für Kärnten. 232 pp.
 
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