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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Cordierite from
Østerådalen, Østerå, Tvedestrand, Agder, Norway


Locality type:Quarry
Classification
Species:Cordierite
Formula:Mg2Al4Si5O18
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cordierite data
Locality Data:Click here to view Østerådalen, Østerå, Tvedestrand, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:700487
Long-form Identifier:1:3:700487:2
GUID (UUID V4):0
Nearest other occurrences of Cordierite
2.1km (1.3 miles) ⓘTangen, Tvedestrand, Agder, Norway
3.3km (2.1 miles) ⓘGladstad, Tvedestrand, Agder, Norway
4.7km (2.9 miles) ⓘLilleholt, Tvedestrand, Agder, Norway
5.8km (3.6 miles) ⓘSunde bridge, Snaresund, Tvedestrand, Agder, Norway
6.3km (3.9 miles) ⓘAmtmannsvingen, Tvedestrand, Agder, Norway
7.9km (4.9 miles) ⓘSolbutjernane, Tvedestrand, Agder, Norway
12.7km (7.9 miles) ⓘMoland Industrial Site, Akland, Risør, Agder, Norway
14.9km (9.3 miles) ⓘBøylefoss Bridge, Froland, Agder, Norway
15.3km (9.5 miles) ⓘRavneberget Quarry, Søndeled, Risør, Agder, Norway
22.2km (13.8 miles) ⓘFaervik school, Tromøy, Arendal, Agder, Norway
References
Weibye, Paul Christian (1848) Beiträge zur topograpischen Mineralogie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde, 22. 465-544
 
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