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-AN from
Unnamed adit, Kniebeißgraben, Naßfeld valley, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria


Classification
Species:Opal var: Opal-AN
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal-AN data
Locality Data:Click here to view Unnamed adit, Kniebeißgraben, Naßfeld valley, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria
Data Identifiers
Mindat Occurrence Record ID:209397
Long-form Identifier:1:3:209397:0
GUID (UUID V4):0
Nearest other occurrences of Opal-AN
0.8km (0.5 miles) ⓘMunicipal quarry (Dick quarry), Böckstein, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria
1.2km (0.7 miles) ⓘPasel adit, Radhausberg, Kreuzkogel massif, Naßfeld valley, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria
3.2km (2.0 miles) ⓘParis adit, Radhausberg, Kreuzkogel massif, Naßfeld valley, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria
3.2km (2.0 miles) ⓘThermal water spa, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria
4.0km (2.5 miles) ⓘSchleierfall tunnel, Naßfeld valley, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria
5.3km (3.3 miles) ⓘSiglitz adit (Imhof-Unterbau adit; Imhof adit), Siglitz - Bockhart gold mining district, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria
6.6km (4.1 miles) ⓘBockhart adit, Siglitz - Bockhart gold mining district, Bad Gastein, St. Johann im Pongau District, Salzburg, Austria
36.1km (22.4 miles) ⓘSeewände quarry, Tauernmoos lake, Enzingerboden, Uttendorf, Zell am See District, Salzburg, Austria
49.8km (30.9 miles) ⓘWestern ore field, Mittersill Scheelite deposit, Mittersill, Zell am See District, Salzburg, Austria
57.5km (35.8 miles) ⓘEmerald deposit, Leckbachgraben, Nasenkopf mountain, Bramberg am Wildkogel, Zell am See District, Salzburg, Austria
References
Strasser, Albert (1989) Die Minerale Salzburgs. Albert Strasser. 348 pp.
 
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