VS
Name
—
[Ag₆As₂S₇][Ag₁₀FeAs₂S₈]
Formula
—
Mineral Species
Entry type
—
Sulfosalts
Chemical class
—
Monoclinic
Crystal system
—
3.5
Mohs hardness
—
5.74
Specific gravity
—
Dark reddish gray
Streak
—
Metallic
Luster
—
Perfect on {001}
Cleavage
—
C2
Space group
—
Fettelite
Structural group
—
Fftt · Approved
IMA
—
2021
Named in
—
Dark red to gray black; grayish white in reflected light
Typical colors
—
Ag · As · S · Fe
Elements
—