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
Hochberg quarry (Hohenberg quarry), Nieder-Ofleiden, Homberg, Vogelsbergkreis, Giessen Region, Hesse, Germany


Locality type:Quarry
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 Hochberg quarry (Hohenberg quarry), Nieder-Ofleiden, Homberg, Vogelsbergkreis, Giessen Region, Hesse, Germany
Data Identifiers
Mindat Occurrence Record ID:180100
Long-form Identifier:1:3:180100:2
GUID (UUID V4):0
Nearest other occurrences of Opal
10.8km (6.7 miles) ⓘKahlenberg quarry, Londorf, Rabenau, Giessen, Giessen Region, Hesse, Germany
20.0km (12.4 miles) ⓘAttenberg quarry, Großen-Buseck, Buseck, Giessen, Giessen Region, Hesse, Germany
25.1km (15.6 miles) ⓘBasalt quarry, Gonterskirchen, Laubach, Giessen, Giessen Region, Hesse, Germany
28.5km (17.7 miles) ⓘSchiffenberg quarry, Hausen, Pohlheim, Giessen, Giessen Region, Hesse, Germany
30.4km (18.9 miles) ⓘDünsberg, Königsberg, Biebertal, Giessen, Giessen Region, Hesse, Germany
30.9km (19.2 miles) ⓘMaykranz Quarry, Langd, Hungen, Giessen, Giessen Region, Hesse, Germany
33.2km (20.6 miles) ⓘHerbstein basalt quarry (Schrimpf basalt quarry), Herbstein, Vogelsbergkreis, Giessen Region, Hesse, Germany
35.4km (22.0 miles) ⓘOber-Widdersheim quarry, Ober-Widdersheim, Nidda, Wetteraukreis, Darmstadt, Hesse, Germany
37.4km (23.2 miles) ⓘHohenstein quarry, Nidda, Wetteraukreis, Darmstadt, Hesse, Germany
42.6km (26.5 miles) ⓘBasalt quarry, Bingenheim, Echzell, Wetteraukreis, Darmstadt, Hesse, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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