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Pyroaurite-2H & Calcite

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SER893146

Pyroaurite-2H & Calcite

ex Americo Urbinati collection

Description Tabs

Description
Locality: 
Grama Valley Quarry, Laghi, Vicenza Province, Veneto, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.6 × 3.2 × 2.1 cm
Description

some exagonal platy crystals of pyroaurite-2H ( a polytipe of pyroaurite) on calcite

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White