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Laumontite & Prehnite

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SHS774940

Laumontite & Prehnite

Description Tabs

Description
Locality: 
Habach Valley, Zell am See District, Salzburg, Austria
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.7 × 1.9 cm
Description

Nice laumontite and prehnite crystals on matrix

Mineral Data
What's on the rock

Laumontite

Formula: 
CaAl2Si4O12·4H2O
Strunz: 
9.GB.10
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Huelgoat (Locmaria-Berrien), Finistère, Brittany, France

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa