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
Bliesenbach Mine, Loope, Engelskirchen, Oberbergischer Kreis, 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 Bliesenbach Mine, Loope, Engelskirchen, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:104392
Long-form Identifier:1:3:104392:1
GUID (UUID V4):0
Nearest other occurrences of Quartz
3.0km (1.9 miles) ⓘSilberkaule Mine, Heckhaus, Engelskirchen, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
3.5km (2.2 miles) ⓘCastor Mine, Loope, Engelskirchen, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
7.6km (4.7 miles) ⓘNikolaus mine (Nicolaus mine), Marialinden, Overath, Rheinisch-Bergischer Kreis, Cologne, North Rhine-Westphalia, Germany
8.5km (5.3 miles) ⓘGrünbleiberg Mine, Niedergelpe, Gummersbach, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
10.5km (6.5 miles) ⓘSiegfried Mine, Dieringhausen, Gummersbach, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
10.8km (6.7 miles) ⓘImmekeppel Mine, Untereschbach, Overath, Rheinisch-Bergischer Kreis, Cologne, North Rhine-Westphalia, Germany
11.8km (7.3 miles) ⓘColumbus mine, Apfel mine, Moitzfeld, Bergisch Gladbach, Rheinisch-Bergischer Kreis, Cologne, North Rhine-Westphalia, Germany
12.6km (7.8 miles) ⓘApfel Mine, Moitzfeld, Bergisch Gladbach, Rheinisch-Bergischer Kreis, Cologne, North Rhine-Westphalia, Germany
12.9km (8.0 miles) ⓘBerzelius Mine, Moitzfeld, Bergisch Gladbach, Rheinisch-Bergischer Kreis, Cologne, North Rhine-Westphalia, Germany
13.1km (8.1 miles) ⓘLüderich Mine, Altenbrück, Steinenbrück, Overath, Rheinisch-Bergischer Kreis, Cologne, North Rhine-Westphalia, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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