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


Locality type:Colliery
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Anna mine, Alsdorf, Aachen, Cologne, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:85576
Long-form Identifier:1:3:85576:5
GUID (UUID V4):0
Nearest other occurrences of Quartz
6.3km (3.9 miles) ⓘDomaniale mine, Kerkrade, Limburg, Netherlands
7.7km (4.8 miles) ⓘEmil Mayrisch Mine, Freialdenhoven, Siersdorf, Aachen, Cologne, North Rhine-Westphalia, Germany
7.9km (4.9 miles) ⓘLaura mine, Eygelshoven, Kerkrade, Limburg, Netherlands
8.8km (5.5 miles) ⓘWilhelmina mine, Kerkrade, Limburg, Netherlands
9.2km (5.7 miles) ⓘWillem-Sophia mine, Kerkrade, Limburg, Netherlands
9.3km (5.8 miles) ⓘHerrenberg Mine, Verlautenheide, Aachen, Cologne, North Rhine-Westphalia, Germany
10.9km (6.7 miles) ⓘDe Groot quarry, Landgraaf, Limburg, Netherlands
11.2km (7.0 miles) ⓘBirkengang zinc smelter slag locality, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
12.6km (7.8 miles) ⓘMeyer Quarry, Hastenrath, Eschweiler, Aachen, Cologne, North Rhine-Westphalia, Germany
12.9km (8.0 miles) ⓘAlbert Mine, Hastenrath, Eschweiler, Aachen, Cologne, North Rhine-Westphalia, Germany
References
Maas, H. H. (1977) Neuere Mineralienfunde im Aachener Steinkohlenrevier. Der Aufschluss, 28 (2) 69-73
Witzke, T., de Wit, F., Kolitsch, U., Blaß, G. (2015) Mineralogy of the Burning Anna I Coal Mine Dump, Alsdorf, Germany. In Coal and Peat Fires: A Global Perspective- Case Studies – Coal Fires Vol. 3. Elsevier. p.203-240. doi:10.1016/C2010-0-68844-4
 
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