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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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Ilsemannite from
Sadisdorf, Dippoldiswalde, Sächsische Schweiz-Osterzgebirge, Saxony, Germany


04017940017272027754222.jpg
Ilsemannite

Sadisdorf, Dippoldiswalde, Sächsische Schweiz-Osterzgebirge, Saxony, Germany
04017940017272027754222.jpg
Ilsemannite

Sadisdorf, Dippoldiswalde, Sächsische Schweiz-Osterzgebirge, Saxony, Germany
04017940017272027754222.jpg
Ilsemannite

Sadisdorf, Dippoldiswalde, Sächsische Schweiz-Osterzgebirge, Saxony, Germany
Locality type:Mine
Classification
Species:Ilsemannite
Formula:Mo3O8 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ilsemannite data
Locality Data:Click here to view Sadisdorf, Dippoldiswalde, Sächsische Schweiz-Osterzgebirge, Saxony, Germany
Data Identifiers
Mindat Occurrence Record ID:95362
Long-form Identifier:1:3:95362:3
GUID (UUID V4):0
Nearest other occurrences of Ilsemannite
10.8km (6.7 miles) ⓘTin mine, Altenberg, Sächsische Schweiz-Osterzgebirge, Saxony, Germany
19.9km (12.4 miles) ⓘVrchoslav fluorite deposit, Vrchoslav, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
21.5km (13.4 miles) ⓘBarbora adit, Knöttel area, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
25.1km (15.6 miles) ⓘGlückauf Shaft, Himmelsfürst Mine, Brand-Erbisdorf, Mittelsachsen, Saxony, Germany
53.1km (33.0 miles) ⓘUranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany
54.1km (33.6 miles) ⓘGreifensteine, Ehrenfriedersdorf, Erzgebirgskreis, Saxony, Germany
References
Kolitsch, Uwe; Witzke, Thomas (1997) Die Mineralien von Sadisdorf, Sächsisches Erzgebirge [The minerals of Sadisdorf, Saxon Ore Mountains]. Lapis, 22 (2). 13-32, 54
Wittern, Artur (2001) Mineralfundorte und ihre Minerale in Deutschland (1st ed.) Schweizerbart, Stuttgart.
 
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