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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Montmorillonite from
Basalt works, Triebendorf, Wiesau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany


Locality type:Workings
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view Basalt works, Triebendorf, Wiesau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
Data Identifiers
Mindat Occurrence Record ID:101571
Long-form Identifier:1:3:101571:3
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
3.7km (2.3 miles) ⓘGroßer Teichelberg (Teichelberg; Teichlberg), Pechbrunn, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
12.6km (7.8 miles) ⓘOberbaumühle Quarry, Oberbaumühle, Windischeschenbach, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
17.3km (10.7 miles) ⓘZinster Kuppe, Kulmain, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
18.9km (11.8 miles) ⓘWolfskehle quarry, Nagel, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany
23.0km (14.3 miles) ⓘFuchsbau quarry, Tröstauer Forst-West, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany
26.9km (16.7 miles) ⓘSchoberth quarry, Rudolfstein, Weißenstadt, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany
27.1km (16.9 miles) ⓘUranium deposit, Rudolfstein, Weißenstadt, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany
33.4km (20.7 miles) ⓘReinersreuth quarry (Köhlerloh quarry), Reinersreuth, Sparneck, Hof District, Upper Franconia, Bavaria, Germany
35.1km (21.8 miles) ⓘHaidberg Quarry, Haidberg hill, Zell im Fichtelgebirge, Hof District, Upper Franconia, Bavaria, Germany
39.3km (24.4 miles) ⓘHeß quarry, Wurlitz, Rehau, Hof District, Upper Franconia, Bavaria, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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