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
Fuchsbau quarry, Tröstauer Forst-West, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany


Locality type:Quarry
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 Fuchsbau quarry, Tröstauer Forst-West, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany
Data Identifiers
Mindat Occurrence Record ID:76355
Long-form Identifier:1:3:76355:2
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
4.9km (3.1 miles) ⓘSchoberth quarry, Rudolfstein, Weißenstadt, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany
5.5km (3.4 miles) ⓘUranium deposit, Rudolfstein, Weißenstadt, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany
6.7km (4.1 miles) ⓘWolfskehle quarry, Nagel, Wunsiedel im Fichtelgebirge, Upper Franconia, Bavaria, Germany
12.7km (7.9 miles) ⓘReinersreuth quarry (Köhlerloh quarry), Reinersreuth, Sparneck, Hof District, Upper Franconia, Bavaria, Germany
13.2km (8.2 miles) ⓘHaidberg Quarry, Haidberg hill, Zell im Fichtelgebirge, Hof District, Upper Franconia, Bavaria, Germany
14.5km (9.0 miles) ⓘZinster Kuppe, Kulmain, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
20.3km (12.6 miles) ⓘGroßer Teichelberg (Teichelberg; Teichlberg), Pechbrunn, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
23.0km (14.3 miles) ⓘBasalt works, Triebendorf, Wiesau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
25.3km (15.7 miles) ⓘHeß quarry, Wurlitz, Rehau, Hof District, Upper Franconia, Bavaria, Germany
29.9km (18.6 miles) ⓘOberbaumühle Quarry, Oberbaumühle, Windischeschenbach, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
References
Lapis, 10 (7/8), 15-26+81
 
and/or  
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