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
Callenberg North open cut No. 1, Callenberg, Zwickau District, Saxony, Germany


Locality type:Open-Cast Mine
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 Callenberg North open cut No. 1, Callenberg, Zwickau District, Saxony, Germany
Data Identifiers
Mindat Occurrence Record ID:77588
Long-form Identifier:1:3:77588:5
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
29.2km (18.2 miles) ⓘGreifensteine, Ehrenfriedersdorf, Erzgebirgskreis, Saxony, Germany
36.7km (22.8 miles) ⓘFacius quarry (Raschau lime works), Langenberg, Raschau-Markersbach, Erzgebirgskreis, Saxony, Germany
43.3km (26.9 miles) ⓘReimersgrün Quarry, Limbach, Vogtlandkreis, Saxony, Germany
48.7km (30.3 miles) ⓘThurmhofschacht, Himmelfahrt Mine, Freiberg, Mittelsachsen, Saxony, Germany
68.8km (42.8 miles) ⓘPorphyrite quarry, Wurgwitz, Freital, Sächsische Schweiz-Osterzgebirge, Saxony, Germany
70.9km (44.1 miles) ⓘMoldava deposit, Moldava, Teplice District, Ústí nad Labem Region, Czech Republic
76.1km (47.3 miles) ⓘKienberg Quarry, Feilitzsch, Hof District, Upper Franconia, Bavaria, Germany
82.9km (51.5 miles) ⓘHeß quarry, Wurlitz, Rehau, Hof District, Upper Franconia, Bavaria, Germany
83.6km (51.9 miles) ⓘVrchoslav fluorite deposit, Vrchoslav, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
86.1km (53.5 miles) ⓘVečerní Hvězda adit, Knöttel area, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
References
Leonhardt, Hanna; Leonhardt, Werner (1991) Das berühmte deutsche Krokoitvorkommen von Callenberg/Sachsen [The famous German crocoite deposit of Callenberg/Saxony]. Lapis, 16 (9). 13-26. 58
 
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