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Laumontite

Type Locality
Huelgoat (Locmaria-Berrien), Finistère, Brittany, France
Mineral Data
CaAl2Si4O12·4H2O
Strunz: 
9.GB.10
Physical Properties
Streak: 
White
Hardness: 
3.5 - 4.0
Tenacity: 
brittle
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