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
Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany


04865200017519683675223.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
03398840017519683682143.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
08844280017519786879771.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
04865200017519683675223.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
04278790017519679116587.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
09989790017519771432430.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
04865200017519683675223.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
03398840017519683682143.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
08844280017519786879771.jpg
Opal-AN, etc.

Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
Locality type:Quarry
Classification
Species:Opal var: Opal-AN
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Calcite3
Data
Mineral Data:Click here to view Opal-AN data
Locality Data:Click here to view Kirchberg Quarry, Oberrotweil, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
Data Identifiers
Mindat Occurrence Record ID:25517
Long-form Identifier:1:3:25517:8
GUID (UUID V4):0
Nearest other occurrences of Opal-AN
3.6km (2.2 miles) ⓘHumberg quarries, Burkheim, Vogtsburg im Kaiserstuhl, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
3.9km (2.4 miles) ⓘFöhrenberg, Ihringen, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
5.4km (3.4 miles) ⓘEichert, Sasbach am Kaiserstuhl, Emmendingen, Freiburg Region, Baden-Württemberg, Germany
7.4km (4.6 miles) ⓘLimberg Quarries, Sasbach am Kaiserstuhl, Emmendingen, Freiburg Region, Baden-Württemberg, Germany
31.8km (19.8 miles) ⓘKlemmbach quarry (Schweighof quarry), Schweighof, Badenweiler, Breisgau-Hochschwarzwald, Freiburg Region, Baden-Württemberg, Germany
37.5km (23.3 miles) ⓘLisbühl, Todtnau, Lörrach, Freiburg Region, Baden-Württemberg, Germany
39.6km (24.6 miles) ⓘMalsburg, Malsburg-Marzell, Lörrach, Freiburg Region, Baden-Württemberg, Germany
41.3km (25.7 miles) ⓘSengalenkopf, Schönau im Schwarzwald, Lörrach, Freiburg Region, Baden-Württemberg, Germany
42.1km (26.1 miles) ⓘSegen Gottes Mine (Gottes Segen Mine; Gottessegen Mine), Haslach im Kinzigtal, Haslach im Kinzigtal, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
47.1km (29.3 miles) ⓘOffenbach valley, Hornberg, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
References
Fricke, G. (1988) Der Kaiserstuhl und seine Minerale. Der Aufschluss, 39 (2) 65-86
 
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