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Offretite

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ESM544115

Offretite

Description Tabs

Description
Locality: 
Schrimpf Basalt Works, Herbstein, Vogelsberg, Giessen Region, Hesse, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.9 × 4 × 3.3 cm
Description

Clear offretite crystals on a basalt matrix

Mineral Data
What's on the rock

Offretite

Formula: 
KCaMgAl5Si13O36·16H2O or near
Strunz: 
9.GD.25
Hardness: 
4.0 - 4.5
Type Locality: 
Mont Semiol (Mont Semiouse; Mont Simiouse), Châtelneuf, Saint-Georges-en-Couzan, Loire, Rhône-Alpes, France