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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Halotrichite from
Anna mine, Alsdorf, Aachen, Cologne, North Rhine-Westphalia, Germany


Locality type:Colliery
Classification
Species:Halotrichite
Formula:Fe2+Al2(SO4)4 · 22H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Halotrichite data
Locality Data:Click here to view Anna mine, Alsdorf, Aachen, Cologne, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:85570
Long-form Identifier:1:3:85570:1
GUID (UUID V4):0
Nearest other occurrences of Halotrichite
9.2km (5.7 miles) ⓘWillem-Sophia mine, Kerkrade, Limburg, Netherlands
47.6km (29.6 miles) ⓘLa Rochette, Chaudfontaine, Liège, Wallonia, Belgium
50.5km (31.4 miles) ⓘPatience et Beaujonc coal dump, Glain, Liège, Liège, Wallonia, Belgium
59.5km (37.0 miles) ⓘChokier, Flémalle-Haute, Flémalle, Liège, Wallonia, Belgium
60.6km (37.7 miles) ⓘRamioul, Ivoz-Ramet, Flémalle, Liège, Wallonia, Belgium
62.1km (38.6 miles) ⓘEngihoul-Antinne, Engis, Liège, Wallonia, Belgium
72.7km (45.1 miles) ⓘLoyable, Ampsin, Amay, Liège, Wallonia, Belgium
79.8km (49.6 miles) ⓘAlstaden coal mine, Alstaden, Oberhausen, Düsseldorf, North Rhine-Westphalia, Germany
88.1km (54.8 miles) ⓘChristian Levin coal mine, Dellwig, Essen, Düsseldorf, North Rhine-Westphalia, Germany
89.9km (55.9 miles) ⓘFranz-Haniel Mine, Bottrop, Münster, North Rhine-Westphalia, Germany
References
Blaß, Günter; Strehler, H. (1993) Mineralbildungen in einer durch Selbstentzündung brennenden Berghalde des Aachener Steinkohlenreviers [Mineral formations in a spontaneously burning mine dump in the Aachen coalfield]. Mineralien-Welt, 4 (4). 35-42
 
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