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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Olivenite from
Genna zinc smelter slag locality, Helmke quarry nature reserve, Letmathe, Iserlohn, Märkischer Kreis, Arnsberg, North Rhine-Westphalia, Germany


Locality type:Slag Locality
Classification
Species:Olivenite
Formula:Cu2(AsO4)(OH)
Formation:Post-mining/Anthropogenic
Comments:Olive-green worm-like or tabular crystals up to 0.3mm associated with gypsum and serpierite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Olivenite data
Locality Data:Click here to view Genna zinc smelter slag locality, Helmke quarry nature reserve, Letmathe, Iserlohn, Märkischer Kreis, Arnsberg, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:76092
Long-form Identifier:1:3:76092:6
GUID (UUID V4):0
Nearest other occurrences of Olivenite
46.4km (28.8 miles) ⓘCastor Mine, Loope, Engelskirchen, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
46.7km (29.0 miles) ⓘMercur Mine (Merkur Mine), Silberg, Kirchhundem, Olpe, Arnsberg, North Rhine-Westphalia, Germany
47.9km (29.8 miles) ⓘSilberkaule Mine, Heckhaus, Engelskirchen, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
50.5km (31.4 miles) ⓘWildermann Mine, Ferndorf, Kreuztal, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
54.8km (34.1 miles) ⓘRamsbeck, Bestwig, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
56.2km (34.9 miles) ⓘLeibnitz-Dante Mine, Hoffnungsthal, Rösrath, Rheinisch-Bergischer Kreis, Cologne, North Rhine-Westphalia, Germany
61.1km (37.9 miles) ⓘFischbacher Werk Mine, Niederfischbach, Kirchen (Sieg), Altenkirchen, Rhineland-Palatinate, Germany
65.4km (40.6 miles) ⓘEisenzecher Zug mine, Eiserfeld, Siegen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
65.8km (40.9 miles) ⓘBrüderbund Mine, Kohlenbach Valley, Eiserfeld, Siegen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
69.4km (43.1 miles) ⓘPius Mine, Schutzbach, Daaden-Herdorf, Altenkirchen, Rhineland-Palatinate, Germany
References
Schnorrer-Köhler, G. (1986) Neue Minerale von der Schlackenhalde der ehemaligen Zinkhütte Genna in Letmathe/Sauerland. Aufschluss, 37 (2), 55-67.
Bender, D.; Krimmelbein, W. (1994) Aktuelle Übersicht: Mineralien der Zinkhütte Genna/Sauerland [Current overview: Minerals from the Genna/Sauerland zinc smelter]. Mineralien Welt, 5 (4). 10
 
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