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Posnjakite

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Posnjakite

Description Tabs

Description
Locality: 
Drakewalls Mine, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
0.7 × 2 × 2.2 cm
Description

Blue posnjakite crystals on matrix

Mineral Data
What's on the rock

Posnjakite

Formula: 
Cu4(SO4)(OH)6·H2O
Strunz: 
7.DD.10
Crystal System: 
Monoclinic
Hardness: 
2.0 - 3.0
Type Locality: 
Nura-Taldy W deposit, Karagandy Province (Qaragandy Oblysy; Karaganda Oblast'), Kazakhstan...