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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Dufrénite from
David Mine (Christiansglück Mine), Warstein, Soest, Arnsberg, North Rhine-Westphalia, Germany


Locality type:Mine
Classification
Species:Dufrénite
Formula:Ca0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Dufrénite data
Locality Data:Click here to view David Mine (Christiansglück Mine), Warstein, Soest, Arnsberg, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:4691
Long-form Identifier:1:3:4691:6
GUID (UUID V4):0
Nearest other occurrences of Dufrénite
72.0km (44.7 miles) ⓘEisenzecher Zug mine, Eiserfeld, Siegen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
74.6km (46.3 miles) ⓘWernsberger Erbstollen Mine (Wernsberg Mine), Brachbach, Kirchen (Sieg), Altenkirchen, Rhineland-Palatinate, Germany
77.5km (48.2 miles) ⓘHollertszug Mine (Hollerter Zug Mine), Dermbach, Herdorf, Daaden-Herdorf, Altenkirchen, Rhineland-Palatinate, Germany
93.6km (58.1 miles) ⓘRotläufchen Mine, Waldgirmes, Lahnau, Lahn-Dill-Kreis, Giessen Region, Hesse, Germany
References
Stieglitz, Hans, Hochleitner, Rupert (1987) Die Grube David bei Warstein [The David mine near Warstein]. Lapis, 12 (5) 32-36
Pawlowski, Dora (1991) Mineralfundstellen im Sauerland. Weise Verlag, Munich, Germany.
 
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