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Analcime & Montmorillonite

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MEX209742

Analcime & Montmorillonite

Classic Locality

Description Tabs

Description
Locality: 
Simmons Bay, Flinders Area, Victoria, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.9 × 3.2 × 2.4 cm
Description

Very nice specimen with two vugs. One is overgrown with montmorillonite groups, the other shows absolute transparent analcime crystal, which overgrown greenish montmorillonite balls.

Mineral Data
What's on the rock

Analcime

Formula: 
Na2(Al2Si4O12)·2H2O
Strunz: 
9.GB.05
Crystal System: 
Triclinic
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Cyclopean Islands, Acitrezza (Aci Trezza), Etna Volcanic Complex, Catania Province, Sicily, Italy

Montmorillonite

Formula: 
(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2·nH2O
Strunz: 
9.EC.40
Hardness: 
1.0 - 2.0
Streak: 
white
Type Locality: 
Montmorillon, Vienne, Poitou-Charentes, France