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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Montmorillonite from
Hedrum Quarry, Lågendalen, Hedrum, Larvik Commune, Vestfold, Norway


Locality type:Quarry
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view Hedrum Quarry, Lågendalen, Hedrum, Larvik Commune, Vestfold, Norway
Data Identifiers
Mindat Occurrence Record ID:167397
Long-form Identifier:1:3:167397:5
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
6.4km (4.0 miles) ⓘVardåsen Quarry, Malerød, Larvik Commune, Vestfold, Norway
6.8km (4.2 miles) ⓘBratthagen 1, Lågendalen, Hedrum, Larvik Commune, Vestfold, Norway
6.9km (4.3 miles) ⓘBratthagen 2, Lågendalen, Hedrum, Larvik Commune, Vestfold, Norway
7.1km (4.4 miles) ⓘBratthagen 3 hillside pegmatites, Lågendalen, Hedrum, Larvik Commune, Vestfold, Norway
7.2km (4.5 miles) ⓘSkallist Quarry, Klåstad, Tjølling, Larvik Commune, Vestfold, Norway
7.8km (4.8 miles) ⓘLysebo roadcut, Lysebo, Hedrum, Larvik Commune, Vestfold, Norway
9.2km (5.7 miles) ⓘTrondsrødfjellet roadcut Rv 301 (Agnes), Stavern (Fredriksvärn), Larvik Commune, Vestfold, Norway
9.6km (6.0 miles) ⓘMelau 2 Quarry, Brunlanes, Larvik Commune, Vestfold, Norway
10.7km (6.7 miles) ⓘFramnes School, Framnes, Vesterøya, Sandefjord, Vestfold, Norway
11.3km (7.0 miles) ⓘHusebyåsen prospect, Vesterøya, Sandefjord, Vestfold, Norway
References
Andersen, Frode (1993) Hedrum pukkverk i Lågendalen. STEIN. Nordisk magasin for populær geologi, 20 (4) 236-238
 
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