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Laumontite & Stilbite

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CR215904

Laumontite & Stilbite

Description Tabs

Description
Locality: 
Seelbach, Herborn, Lahn-Dill, Giessen Region, Hesse, Germany
Size Range: 
Cabinet (10-18 cm)
Size: 
13 × 9 × 7.5 cm
Description

Beautiful vug with beige colored laumontite crystals and pale yellow stilbite crystals from a old collection.

Collected 1976

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

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White