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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Eudialyte Group from
Johs Nilsens Quarry, Tvedalen, Larvik Commune, Vestfold, Norway


Locality type:Quarry
Classification
Species:'Eudialyte Group' (not an IMA approved species)
Formula:[N(1)N(2)N(3)N(4)N(5)]3[M(1.1)M(1.2)]3[M(2.1)M(2.2)M(2.3)]3-6[M(3)M(4)]Z3[Si24O72]Θ4X(1)X(2)
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Eudialyte Group data
Locality Data:Click here to view Johs Nilsens Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
Data Identifiers
Mindat Occurrence Record ID:980974
Long-form Identifier:1:3:980974:1
GUID (UUID V4):0
Nearest other occurrences of Eudialyte Group
0.4km (0.2 miles) ⓘA/S Granit Quarry, Tuften, Tvedalen, Larvik Commune, Vestfold, Norway
4.5km (2.8 miles) ⓘNatrolittodden, Vesle Arøya, Larvik Commune, Vestfold, Norway
4.6km (2.8 miles) ⓘEudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
4.6km (2.9 miles) ⓘArøysundet, Larvik Commune, Vestfold, Norway
4.7km (2.9 miles) ⓘEikaholmen, Larvik Commune, Vestfold, Norway
5.2km (3.2 miles) ⓘArøyskjærene North, Arøyskjærene (Arøy skerries), Larvik Commune, Vestfold, Norway
5.3km (3.3 miles) ⓘEudialyte group occurrence, Siktesøya, Porsgrunn, Telemark, Norway
5.9km (3.7 miles) ⓘFerry Quay, Bjørkøya, Porsgrunn, Telemark, Norway
6.6km (4.1 miles) ⓘRamberg strand, Bjønnes, Porsgrunn, Telemark, Norway
11.6km (7.2 miles) ⓘStavern (Fredriksvärn), Larvik Commune, Vestfold, Norway
References
Peter Andresen collection, 2016.
 
and/or  
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