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Argyrodite with Pyrargyrite

#38163

Argyrodite with Pyrargyrite

#38163
Availability
Sold
Size
0.4 x 0.2 x 0.2 cm - Thumbnail 
Formula
Ag8GeS6 (RRUFF)
Locality
Colquechaca, Potosi dept., Bolivia
Tagged
sulfide

From Dr. Jaroslav Hrysl's Tucson stock is this combonation specimen or Pyrargyrite and Argyrodite, a rare germanium sulfide with silver. The Argyrodite is hard to see in the photos drowned out be the red of the Pyrargyrite. It's a small capsule specimen!

Argyrodite

Formula
Ag8GeS6 
Crystal System
Orthorhombic 
Crystal Habit
Subhedral Crystals, Massive - Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
black, steel gray 
Streak
grayish black 
Class
Orthorhombic - Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness
2.5 

Data courtesy of Webmineral.

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