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
Emil Mayrisch Mine, Freialdenhoven, Siersdorf, Aachen, Cologne, North Rhine-Westphalia, Germany


Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Emil Mayrisch Mine, Freialdenhoven, Siersdorf, Aachen, Cologne, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:85557
Long-form Identifier:1:3:85557:0
GUID (UUID V4):0
Nearest other occurrences of Quartz
7.7km (4.8 miles) ⓘAnna mine, Alsdorf, Aachen, Cologne, North Rhine-Westphalia, Germany
13.3km (8.3 miles) ⓘLaura mine, Eygelshoven, Kerkrade, Limburg, Netherlands
13.4km (8.4 miles) ⓘDomaniale mine, Kerkrade, Limburg, Netherlands
14.4km (8.9 miles) ⓘDe Groot quarry, Landgraaf, Limburg, Netherlands
14.8km (9.2 miles) ⓘSophia-Jacoba Mine, Hückelhoven, Heinsberg, Cologne, North Rhine-Westphalia, Germany
15.4km (9.6 miles) ⓘWilhelmina mine, Kerkrade, Limburg, Netherlands
15.6km (9.7 miles) ⓘMeyer Quarry, Hastenrath, Eschweiler, Aachen, Cologne, North Rhine-Westphalia, Germany
15.7km (9.7 miles) ⓘBirkengang zinc smelter slag locality, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
15.7km (9.8 miles) ⓘAlbert Mine, Hastenrath, Eschweiler, Aachen, Cologne, North Rhine-Westphalia, Germany
15.8km (9.8 miles) ⓘHerrenberg Mine, Verlautenheide, Aachen, Cologne, North Rhine-Westphalia, Germany
References
Maas, H. H. (1977) Neuere Mineralienfunde im Aachener Steinkohlenrevier. Der Aufschluss, 28 (2) 69-73
 
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