VS
Name
—
Bi₂S₃
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Orthorhombic
Crystal system
—
2–2.5
Mohs hardness
—
6.78
Specific gravity
—
Lead-gray
Streak
—
Metallic. Anisotropism: Strong, especially in oil. R1 –R2: (400) 35.7–46.2, (420) 36.4–47.2, (440) 37.2–47.9
Luster
—
{010}, perfect and easy, {100} and {110}, imperfect
Cleavage
—
Pnma
Space group
—
Stibnite
Structural group
—
Bin · Grandfathered
IMA
—
1832
Named in
—
Lead-gray to tin-white, with a yellowish or iridescent tarnish
Typical colors
—
Bi · S
Elements
—