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


09244740017366196426822.jpg
Opal-AN, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
05632560017366196432758.jpg
Opal-AN, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
05182700017271988318054.jpg
Opal-AN, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
05632560017366196432758.jpg
Opal-AN, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
05182700017271988318054.jpg
Opal-AN, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
05632560017366196432758.jpg
Opal-AN, etc.

Aldrian quarry, Lieschengraben, Oberhaag, Leibnitz District, Styria, 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 Aldrian quarry (Hofstatt quarry), Lieschengraben, Oberhaag, Leibnitz District, Styria, Austria
Data Identifiers
Mindat Occurrence Record ID:1011016
Long-form Identifier:1:3:1011016:6
GUID (UUID V4):0
Nearest other occurrences of Opal
15.6km (9.7 miles) ⓘHartner quarry, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
16.8km (10.4 miles) ⓘPolanz quarry (Mauthnereck), Krumbach, Sankt Oswald ob Eibiswald, Eibiswald, Deutschlandsberg District, Styria, Austria
21.1km (13.1 miles) ⓘRostock creek, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
22.7km (14.1 miles) ⓘLaßnitzgraben, Deutschlandsberg, Deutschlandsberg District, Styria, Austria
23.1km (14.4 miles) ⓘMüllerbauer, Schwarze Sulm, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
24.7km (15.4 miles) ⓘSchwagbauer (Schwoagbauer), Osterwitz, Deutschlandsberg, Deutschlandsberg District, Styria, Austria
26.2km (16.3 miles) ⓘFuchskogel, Glashütten, Bad Schwanberg, Deutschlandsberg District, Styria, Austria
28.4km (17.6 miles) ⓘBasalt quarry, Weitendorf, Wildon, Leibnitz District, Styria, Austria
32.1km (20.0 miles) ⓘSpodumene prospect, Brandrücken, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria
34.6km (21.5 miles) ⓘStoffhütte pegmatite, Deutschlandsberg, Deutschlandsberg District, Styria, Austria
References
Neschen, Peter (n.d.) Personal communication.
 
and/or  
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