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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Heulandite-Ca from
Stålaker Quarry, Stålaker, Tjølling, Larvik Commune, Vestfold, Norway


Locality type:Quarry
Classification
Species:Heulandite-Ca
Formula:(Ca,Na)5(Si27Al9)O72 · 26H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Heulandite-Ca data
Locality Data:Click here to view Stålaker Quarry, Stålaker, Tjølling, Larvik Commune, Vestfold, Norway
Data Identifiers
Mindat Occurrence Record ID:676352
Long-form Identifier:1:3:676352:7
GUID (UUID V4):0
Nearest other occurrences of Heulandite-Ca
0.9km (0.6 miles) ⓘHåkestad Quarry, Håkestad, Tjølling, Larvik Commune, Vestfold, Norway
3.6km (2.2 miles) ⓘKlåstad Quarry, Klåstad, Tjølling, Larvik Commune, Vestfold, Norway
3.8km (2.3 miles) ⓘHasle Quarry, Klåstad, Tjølling, Larvik Commune, Vestfold, Norway
9.2km (5.7 miles) ⓘBuer, Vesterøya, Sandefjord, Vestfold, Norway
14.3km (8.9 miles) ⓘBjørndalen Quarry (Lundhs labrador), Tvedalen, Larvik Commune, Vestfold, Norway
16.4km (10.2 miles) ⓘSagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway
44.7km (27.8 miles) ⓘValberg Quarry, Valberg, Kragerø, Telemark, Norway
45.0km (27.9 miles) ⓘFalkenstensvingen, Falkensten, Borre, Horten, Vestfold, Norway
45.1km (28.0 miles) ⓘBrekke Tunnel, Helland, Holmestrand, Vestfold, Norway
45.4km (28.2 miles) ⓘReggestad, Holmestrand, Vestfold, Norway
References
Larsen, Alf Olav; Andersen, Frode; Dahlgren, Sven; Larsen, Knut Edvard; Burvald, Ingulv - Ed. (2010) The Langesundsfjord - History, geology, pegmatites, minerals. Bode Verlag Gmbh. 240 pp.
 
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