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Posnjakite Langite

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MNR122792

Posnjakite Langite

Classic Locality

Description Tabs

Description
Locality: 
Richtárová, Staré Hory, Banská Bystrica County, Banská Bystrica Region, Slovakia (Slovak Republic)
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.8 × 2.6 × 1.8 cm
Description

Rich sample of posnjakite (light-blue) crystals in paragenesis with dark blue langite crystals. Posnjakite is rarily found in such quality at this locale that is practically not existing anymore due to recultivation. Found in 1995.

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...

Langite

Formula: 
Cu4(SO4)(OH)6·2H2O
Strunz: 
7.DD.10
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Type Locality: 
Fowey Consols (incl. Wheal Treasure; Wheal Fortune; Wheal Chance), Tywardreath, St Austell District, Cornwall, England, UK