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Glauconite

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SHS623573

Glauconite

Description Tabs

Description
Locality: 
Roubaix, Galena, Lawrence County, South Dakota, United States of America
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 2 × 1.4 cm
Description

Glauconite in matrix

Mineral Data
What's on the rock

Glauconite

Formula: 
(K,Na)(Fe3+,Al,Mg)2(Si,Al,Fe3+)4O10)(OH)2
Hardness: 
2.0
Streak: 
None