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Argyrodite with Pyrargyrite

#BM46117

Argyrodite with Pyrargyrite

#BM46117
Availability
Sold
Size
4 x 3.5 x 2 cm - Miniature 
Formula
Ag8GeS6 (RRUFF)
Locality
Colquechaca, Potosi dept., Bolivia
Tagged
silver

Black metallic mass which is moslty composed of Pyrargyite (EDS). There are tiny 1mm and less crystals which have tested out by EDS to be Argyrodite. You need a microscope to see the Argyrodite crystals which are camouflaged well by the Pyrargyrite. It is an old specimen that originated with Don Phillips, who sold it to Bill McConlogue, both of who sold their collections to me. As you can see someone glued a label on it prior to Phillips obtaining the specimen. I do not have an original label however. 

EDS Confirmed

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.

Collection
McConlogue Collection
Special Info
EDS Confirmed

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