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Pyroaurite-2H & Hydromagnesite

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ESM518340

Pyroaurite-2H & Hydromagnesite

Description Tabs

Description
Locality: 
Lytton, Sonoma County, California, United States of America
Class: 
Combination
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 2.6 × 2.1 cm
Description

Colorless blades of hydromagnesite on a coating of green pyroaurite-2H (sjögrenite)

Mineral Data
What's on the rock

Pyroaurite-2H

Formula: 
Mg6Fe3+2(CO3)(OH)16·4H2O
Strunz: 
5.DA.45
Crystal System: 
Hexagonal
Hardness: 
2.5
Type Locality: 
Långban, Filipstad, Värmland, Sweden

Hydromagnesite

Formula: 
Mg5(CO3)4(OH)2·4H2O
Strunz: 
5.DA.05
Crystal System: 
Monoclinic
Hardness: 
3.5
Type Locality: 
Castle Point, Hoboken, Hudson Co., New Jersey, USA