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Dominant species
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Argyrodite
Chemical
Formula
Ag8GeS6
Species
Sulfides
Crystal
System
Orthorhombic
Mohs
Scale
2-3
Specific
Gravity
6.2-6.5
Color
Black, purplish tinge
Streak
grey-black
Luster
Metallic
Diaphaneity
Opaque
Cleavage
Absent
Fracture
Irregular/Uneven, Conchoidal
Crystal Habit:Pseudo-octahedra, dodecahedra, cubes; radiating crystal aggregates, botryoidal crusts, or massive
Geological Setting:Low temperature polymetallic deposits, high temperature Ag-Sn deposits.
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