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Heulandite-K

Type Locality
Near Albero Bassi locality, Santorso, Vicenza Province, Veneto, Italy
Mineral Data
(K,Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Physical Properties
Streak: 
White
Hardness: 
3.0 - 3.5
Tenacity: 
brittle
Synonyms
Synonyms: 
Heulandite K and Heulandite - K