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Tetrahedrite -Tennantite with alterations

#43279

Tetrahedrite -Tennantite with alterations

#43279
Availability
Sold
Size
8 x 6 x 2.5 cm - Sm Cabinet 
Formula
Cu12Sb4S13 (RRUFF)
Locality
Tsumeb mine, Tsumeb, Namibia

This is a severly corroded tetrahedrite/tennantite and/or Enargite specimen with bluish green alterations once labelled as "Stranskiite", which I doubt.

Tetrahedrite

Formula
Cu12Sb4S13 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
iron gray, black, steel gray 
Streak
black 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 

Data courtesy of Webmineral.

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