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Chalcophyllite

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SER1063778

Chalcophyllite

ex Americo Urbinati collection

Description Tabs

Description
Locality: 
Monte Avanza Mine, Forni Avoltri, Udine Province, Friuli Venezia Giulia, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 1.4 × 1.1 cm
Description

in a vug, many emerald green hexagons of chalcophyllite

Mineral Data
What's on the rock

Chalcophyllite

Formula: 
Cu18Al2(SO4)3(AsO4)3(OH)27·33H2O
Strunz: 
8.DF.30
Crystal System: 
Trigonal
Hardness: 
2.0