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Posnjakite & Hemimorphite

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SMM803330

Posnjakite & Hemimorphite

Description Tabs

Description
Locality: 
Baccu Locci Mine, Villaputzu, Cagliari Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.2 × 0.6 cm
Description

Some crystal groups of electric blue leaves of posnjakite spread on the matrix with pale-blue/white hemispheres and colorless crystals of hemimorphite. Posnjakite in Baccu Locci is a not spread species. Cute specimen.

Boxed with Label
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...

Hemimorphite

Formula: 
Zn4Si2O7(OH)2·H2O
Strunz: 
9.BD.10
Hardness: 
4.5 - 5.0
Streak: 
White
Type Locality: 
Băiţa Mining District (Baita Bihor; Rézbánya), Nucet, Bihor Co., Romania

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