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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Opal-AN from
Kahlenberg, Oberstadtfeld, Daun, Vulkaneifel, Rhineland-Palatinate, Germany


Locality type:Quarry
Classification
Species:Opal var: Opal-AN
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal-AN data
Locality Data:Click here to view Kahlenberg, Oberstadtfeld, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
Data Identifiers
Mindat Occurrence Record ID:85138
Long-form Identifier:1:3:85138:9
GUID (UUID V4):0
Nearest other occurrences of Opal-AN
4.8km (3.0 miles) ⓘEmmelberg, Üdersdorf, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
9.1km (5.6 miles) ⓘDöhmberg, Oberehe-Stroheich, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
11.0km (6.9 miles) ⓘGoßberg, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
12.3km (7.6 miles) ⓘGraulay quarry, Hillesheim, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
12.3km (7.7 miles) ⓘKyller Höhe, Hillesheim, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
38.5km (23.9 miles) ⓘCaspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
60.9km (37.8 miles) ⓘLyngsberg (Lühnsberg; Lünsberg), Bad Godesberg, Bonn, Cologne, North Rhine-Westphalia, Germany
85.4km (53.1 miles) ⓘNeumühlberg quarry (Steinsberg quarry), Biebrich, Aar-Einrich, Rhein-Lahn-Kreis, Rhineland-Palatinate, Germany
References
Hentschel, Gerhard (1987) Die Mineralien der Eifelvulkane (2nd ed.). Christian Weise Verlag. 177 pp.
 
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