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Prehnite

Type Locality
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa
Mineral Data
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Physical Properties
Streak: 
White
Hardness: 
6.0 - 6.5
Tenacity: 
brittle
Synonyms
Synonyms: 
Prehnit
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