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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Quartz from
Friedrich-Heinrich coal mine, Kamp-Lintfort, Wesel, Düsseldorf, North Rhine-Westphalia, Germany


Locality type:Colliery
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Friedrich-Heinrich coal mine, Kamp-Lintfort, Wesel, Düsseldorf, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:815705
Long-form Identifier:1:3:815705:8
GUID (UUID V4):0
Nearest other occurrences of Quartz
10.5km (6.5 miles) ⓘDiergardt-Mevissen Mine, Rheinhausen, Duisburg, Düsseldorf, North Rhine-Westphalia, Germany
18.6km (11.5 miles) ⓘAlstaden coal mine, Alstaden, Oberhausen, Düsseldorf, North Rhine-Westphalia, Germany
23.3km (14.5 miles) ⓘGeorg mine, Lintorf, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
23.4km (14.6 miles) ⓘNeu-Diepenbrock Mine, Saarn, Mülheim an der Ruhr, Düsseldorf, North Rhine-Westphalia, Germany
26.7km (16.6 miles) ⓘChristian Levin coal mine, Dellwig, Essen, Düsseldorf, North Rhine-Westphalia, Germany
28.6km (17.8 miles) ⓘProsper coal mine, Bottrop, Münster, North Rhine-Westphalia, Germany
30.9km (19.2 miles) ⓘVogelsangbach valley, Heiligenhaus, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
31.6km (19.6 miles) ⓘGraf Moltke coal mine, Gladbeck, Recklinghausen, Münster, North Rhine-Westphalia, Germany
32.7km (20.3 miles) ⓘA44 Highway cut, Heiligenhaus, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
33.6km (20.9 miles) ⓘZollverein coal mine, Stoppenberg, Essen, Düsseldorf, North Rhine-Westphalia, Germany
References
Leon Hupperichs collection
 
and/or  
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