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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Prehnite from
Tvillingbru, Holmestrand, Vestfold, Norway


01541850017362551766580.jpg
Prehnite, etc.

Tvillingbru, Holmestrand, Vestfold, Norway
02689010017272063412392.jpg
Prehnite, etc.

Tvillingbru, Holmestrand, Vestfold, Norway
07665000017272033884734.jpg
Prehnite, etc.

Tvillingbru, Holmestrand, Vestfold, Norway
05049350017272063297705.jpg
Prehnite, etc.

Tvillingbru, Holmestrand, Vestfold, Norway
07665000017272033884734.jpg
Prehnite, etc.

Tvillingbru, Holmestrand, Vestfold, Norway
05049350017272063297705.jpg
Prehnite, etc.

Tvillingbru, Holmestrand, Vestfold, Norway
Locality type:Outcrop
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Epidote2
Quartz1
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Tvillingbru, Holmestrand, Vestfold, Norway
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:169187
Long-form Identifier:1:3:169187:0
GUID (UUID V4):0
Nearest other occurrences of Prehnite
0.0km (0.0 miles) ⓘSjøskogen, Holmestrand, Vestfold, Norway
0.2km (0.1 miles) ⓘRamberg terrasse, Botne, Holmestrand, Vestfold, Norway
0.3km (0.2 miles) ⓘKleivanveien, Botne, Holmestrand, Vestfold, Norway
0.7km (0.4 miles) ⓘBjerkeli residental area, Botne, Holmestrand, Vestfold, Norway
1.2km (0.7 miles) ⓘSolsikken, Søndre Kleivan, Holmestrand, Vestfold, Norway
1.4km (0.9 miles) ⓘSøndre Kleivan, Holmestrand, Vestfold, Norway
1.8km (1.1 miles) ⓘRove, Botne, Holmestrand, Vestfold, Norway
1.9km (1.2 miles) ⓘRailway tunnel, Fjordveien, Holmestrand, Vestfold, Norway
2.1km (1.3 miles) ⓘHvitsteinbakken, Holmestrand, Vestfold, Norway
3.3km (2.0 miles) ⓘHvittingfossveien, Kleivbrottet, Holmestrand, Vestfold, Norway
References
Larsen, Knut Edvard, Larsen, Stig (2005) Mineralforekomster på Vestfold lavaplatå. Del 2: I B1-nivåets basalter [Mineral localities in the Vestfold lava plateau. Part II: In the B1 basalts]. Norsk Bergverksmuseum Skrift, 30. 41-57
 
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