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Faujasite-Na & Offretite

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PDM649487

Faujasite-Na & Offretite

Type Locality

Description Tabs

Description
Locality: 
Limberg Quarries, Sasbach am Kaiserstuhl, Freiburg Region, Baden-Württemberg, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.1 × 1.8 × 1.2 cm
Largest Crystal: 
0.50cm
Description

Classic specimen of faujasite-Na from the type locality, with octahedral crystals lining voids of the volcanic rock, associated to rounded aggregates of offretite.

Acquired in 1988, it is a specimen of the Gerard Vogel collection.

Mineral Data
What's on the rock

Faujasite-Na

Formula: 
(Na2,Ca,Mg)3.5[Al7Si17O48]·32H2O
Strunz: 
9.GD.30
Crystal System: 
Isometric
Hardness: 
5.0
Type Locality: 
Limberg Quarries, Sasbach, Kaiserstuhl, Baden-Württemberg, Germany

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

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