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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Heulandite Subgroup from
Aorite quarry (Bitsch Quarry; Am Bannels), Erlenbach, Fürth, Bergstraße, Darmstadt, Hesse, Germany


02757360017369414947275.jpg
Heulandite Subgroup

Aorite quarry, Erlenbach, Fürth, Bergstraße, Darmstadt, Hesse, Germany
02757360017369414947275.jpg
Heulandite Subgroup

Aorite quarry, Erlenbach, Fürth, Bergstraße, Darmstadt, Hesse, Germany
01384450017272022632059.jpg
Heulandite Subgroup

Aorite quarry, Erlenbach, Fürth, Bergstraße, Darmstadt, Hesse, Germany
Locality type:Quarry
Classification
Species:'Heulandite Subgroup' (not an IMA approved species)
Formula:(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Heulandite Subgroup data
Locality Data:Click here to view Aorite quarry (Bitsch Quarry; Am Bannels), Erlenbach, Fürth, Bergstraße, Darmstadt, Hesse, Germany
Data Identifiers
Mindat Occurrence Record ID:165261
Long-form Identifier:1:3:165261:1
GUID (UUID V4):0
Nearest other occurrences of Heulandite Subgroup
3.8km (2.4 miles) ⓘKreuzer & Böhringer Quarry, Das Buch, Lindenfels, Bergstraße, Darmstadt, Hesse, Germany
5.4km (3.4 miles) ⓘRöhrig quarry (Röhrig gravel works), Kohlplatte, Sonderbach, Heppenheim, Bergstraße, Darmstadt, Hesse, Germany
10.6km (6.6 miles) ⓘMühlberg Quarry, Billings, Fischbachtal, Darmstadt-Dieburg, Darmstadt, Hesse, Germany
14.2km (8.8 miles) ⓘEmmertsberg quarry, Waschenbach, Mühltal, Darmstadt-Dieburg, Darmstadt, Hesse, Germany
14.5km (9.0 miles) ⓘGlasberg quarry, Nieder-Beerbach, Mühltal, Darmstadt-Dieburg, Darmstadt, Hesse, Germany
47.2km (29.3 miles) ⓘStahl quarry, Dörrmorsbach, Haibach, Aschaffenburg District, Lower Franconia, Bavaria, Germany
80.2km (49.9 miles) ⓘGaulsberg quarry, Ortenberg, Wetteraukreis, Darmstadt, Hesse, Germany
References
Nickel, E., and Fettel, M. (1985): Odenwald. Sammlung geologischer Führer Vol. 65, 2nd ed., Bornträger (Berlin, Stuttgart), 231 pp.
 
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