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Chalcocite

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QRI686156

Chalcocite

Former collection Burger (Switzerland)

Description Tabs

Description
Locality: 
Grasdalen, Tokke, Vestfold og Telemark, Norway
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 4.5 × 2.1 cm
Description

An intriguing specimen of what is addressed to be chalcocite with cross cutting malachite and azurite veins, possibly given by secondary alteration. Upon a first impact I thought this was a fossil tree later mineralised with sulfides and secondaries.
The locality reported on the label is Saetersdahl, Norway. After some time searching for documentation on the locality, I have come to the conclusion that this chalcocite is propably from Grasdalen, Norway.
Former collection Burger (Switzerland), pre-WWII and relabelled in modern times.
 

Previous labels supplied (not photographed)
Mineral Data
What's on the rock

Chalcocite

Formula: 
Cu2S
Strunz: 
2.BA.05
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0

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