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


Locality type:Colliery
Classification
Species:Dolomite
Formula:CaMg(CO3)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Dolomite data
Locality Data:Click here to view Anna mine, Alsdorf, Aachen, Cologne, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:85569
Long-form Identifier:1:3:85569:5
GUID (UUID V4):0
Nearest other occurrences of Dolomite
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
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
13.4km (8.4 miles) ⓘZufriedenheit Mine, Mausbach, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
14.4km (8.9 miles) ⓘHenriette Shaft, Diepenlinchen Mine, Mausbach, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
14.4km (8.9 miles) ⓘBSR Gravel works quarry, Gressenich, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
14.5km (9.0 miles) ⓘHendrik mine, Brunssum, Limburg, Netherlands
14.6km (9.1 miles) ⓘDiepenlinchen Mine, Mausbach, Stolberg, 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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