VS
Name
—
AgFe₂S₃
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Monoclinic
Crystal system
—
3.5–4
Mohs hardness
—
4.25
Specific gravity
—
—
Streak
—
Metallic. Anisotropism: Strong, deep blue to pale blue-gray. R1-R2: (400) 20.5-29.4, (420) 21.6-30.2, (440) 22.7-30.8
Luster
—
—
Cleavage
—
P2_1/n
Space group
—
Cubanite
Structural group
—
Agpy · Grandfathered
IMA
—
1866
Named in
—
Bright gray-white when fresh, commonly tarnished iridescent in greens, blues, yellows, purples, and browns
Typical colors
—
Ag · Fe · S
Elements
—