Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Prehnite from
Bredsjönäs Mines, Åker, Strängnäs, Södermanland County, Sweden


Locality type:Mine
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Bredsjönäs Mines, Åker, Strängnäs, Södermanland County, Sweden
Data Identifiers
Mindat Occurrence Record ID:63215
Long-form Identifier:1:3:63215:5
GUID (UUID V4):0
Nearest other occurrences of Prehnite
24.5km (15.2 miles) ⓘKalkugnstorp, Eskilstuna, Södermanland County, Sweden
47.5km (29.5 miles) ⓘTullinge, Botkyrka, Stockholm County, Sweden
48.4km (30.1 miles) ⓘSjösa mines, Svärta ore field, Nyköping, Södermanland County, Sweden
50.8km (31.6 miles) ⓘStora Vika, Nynäshamn, Stockholm County, Sweden
76.6km (47.6 miles) ⓘYtterby, Resarö, Vaxholm, Stockholm County, Sweden
95.2km (59.2 miles) ⓘAlmunge complex, Almunge, Uppsala, Uppsala County, Sweden
99.2km (61.6 miles) ⓘBanmossen, Heby, Uppsala County, Sweden
References
Perge, Anders (1992) Bredsjönäsexkursionen. Berg & Mineral. Medlemstidning för Stockholms Amatörgeologiska Sällskap, 2 (4) 8
Torstensson, Ove - Ed. (2004) Bredsjönäs mineralogi [The mineralogy of Bredsjönäs]. Berg & Mineral. Medlemstidning för Stockholms Amatörgeologiska Sällskap, 14 (43) 19-22
 
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