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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Umangite from
Roter Bär Mine, St Andreasberg, Braunlage, Goslar District, Lower Saxony, Germany


Locality type:Mine
Classification
Species:Umangite
Formula:Cu3Se2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Umangite data
Locality Data:Click here to view Roter Bär Mine, St Andreasberg, Braunlage, Goslar District, Lower Saxony, Germany
Data Identifiers
Mindat Occurrence Record ID:82161
Long-form Identifier:1:3:82161:6
GUID (UUID V4):0
Nearest other occurrences of Umangite
9.9km (6.1 miles) ⓘBrummerjan Mine, Zorge, Walkenried, Göttingen District, Lower Saxony, Germany
15.5km (9.6 miles) ⓘWeintraube Mine, Lerbach, Osterode am Harz, Göttingen District, Lower Saxony, Germany
26.0km (16.1 miles) ⓘTrogtal Quarries, Harz (Landkreis Goslar), Goslar District, Lower Saxony, Germany
45.1km (28.0 miles) ⓘGreywacke quarry, Rieder, Ballenstedt, Harz, Saxony-Anhalt, Germany
54.0km (33.5 miles) ⓘTilkerode mining district, Mansfeld, Mansfeld-Südharz, Saxony-Anhalt, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
Cabral, A. R., Ließmann, W., Jian, W., & Lehmann, B. (2017). Bismuth selenides from St. Andreasberg, Germany: an oxidised five-element style of mineralisation and its relation to post-Variscan vein-type deposits of central Europe. International Journal of Earth Sciences, 106(7), 2359-2369.
 
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