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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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Stilbite Subgroup from
Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway


00590570017367196007427.jpg
Stilbite Subgroup, etc.

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
08984110017272033647426.jpg
Stilbite Subgroup

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
04363270017367196001149.jpg
Stilbite Subgroup

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
01666740017362411238448.jpg
Stilbite Subgroup, etc.

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
08984110017272033647426.jpg
Stilbite Subgroup

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
04363270017367196001149.jpg
Stilbite Subgroup

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
00590570017367196007427.jpg
Stilbite Subgroup, etc.

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
08984110017272033647426.jpg
Stilbite Subgroup

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
04363270017367196001149.jpg
Stilbite Subgroup

Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
Locality type:Mine
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Calcite2
Pyrrhotite1
Fluorapophyllite-(K)1
Pyrite1
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Dalen-Kjørholt Mine, Brevik, Porsgrunn, Telemark, Norway
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:469697
Long-form Identifier:1:3:469697:1
GUID (UUID V4):0
Nearest other occurrences of Stilbite Subgroup
11.0km (6.8 miles) ⓘRamsåskollen, Skien, Telemark, Norway
15.0km (9.3 miles) ⓘHavneberget, Nevlunghavn, Larvik Commune, Vestfold, Norway
25.0km (15.5 miles) ⓘValberg Quarry, Valberg, Kragerø, Telemark, Norway
26.3km (16.3 miles) ⓘØstland, Kragerø, Telemark, Norway
27.5km (17.1 miles) ⓘRefsalen, Sannidal, Kragerø, Telemark, Norway
30.0km (18.6 miles) ⓘRoadcut 2, Stulen ore field, Skien, Telemark, Norway
45.0km (28.0 miles) ⓘHimberg Quarry, Ramnes, Tønsberg, Vestfold, Norway
47.9km (29.8 miles) ⓘRavneberget Quarry, Søndeled, Risør, Agder, Norway
57.7km (35.8 miles) ⓘBentsrud (Solumbrekka), Holmestrand, Vestfold, Norway
59.0km (36.7 miles) ⓘHvitsteinbakken, Holmestrand, Vestfold, Norway
References
Nordrum, Fred Steinar (1993) De siste års mineralfunn i Dalen-Kjørholt gruve, in Telemark I. STEIN. Nordisk magasin for populær geologi, 20 (2) 100-110
 
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