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Montmorillonite

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SHS620749

Montmorillonite

Description Tabs

Description
Locality: 
Tamminen Quarry, Greenwood, Oxford County, Maine, United States of America
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1.4 × 1.2 cm
Description

Nice montmorillonite in matrix

Mineral Data
What's on the rock

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