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 from
Goldloch Shaft, Gorxheim, Gorxheimertal, Bergstraße, Darmstadt, Hesse, Germany


Locality type:Shaft
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Goldloch Shaft, Gorxheim, Gorxheimertal, Bergstraße, Darmstadt, Hesse, Germany
Data Identifiers
Mindat Occurrence Record ID:165352
Long-form Identifier:1:3:165352:6
GUID (UUID V4):0
Nearest other occurrences of Opal
5.4km (3.4 miles) ⓘUrsenbach Mine, Ursenbach, Schriesheim, Rhein-Neckar-Kreis, Karlsruhe Region, Baden-Württemberg, Germany
17.9km (11.1 miles) ⓘOber-Ostern, Reichelsheim, Odenwaldkreis, Darmstadt, Hesse, Germany
18.6km (11.5 miles) ⓘLinck marble works, Auerbach, Bensheim, Bergstraße, Darmstadt, Hesse, Germany
28.1km (17.5 miles) ⓘSchwetzinger Straße slag locality, Wiesloch, Rhein-Neckar-Kreis, Karlsruhe Region, Baden-Württemberg, Germany
34.0km (21.1 miles) ⓘHering, Otzberg, Darmstadt-Dieburg, Darmstadt, Hesse, Germany
34.6km (21.5 miles) ⓘRoßberg Quarry, Roßdorf, Darmstadt-Dieburg, Darmstadt, Hesse, Germany
58.6km (36.4 miles) ⓘWeiße Grube, Imsbach, Winnweiler, Donnersbergkreis, Rhineland-Palatinate, Germany
60.0km (37.3 miles) ⓘGrüner Löwe Mine, Imsbach, Winnweiler, Donnersbergkreis, Rhineland-Palatinate, Germany
60.5km (37.6 miles) ⓘKatharina II Mine, Imsbach, Winnweiler, Donnersbergkreis, Rhineland-Palatinate, Germany
60.6km (37.7 miles) ⓘKatharina I Mine, Imsbach, Winnweiler, Donnersbergkreis, Rhineland-Palatinate, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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