VS
Name
—
Pb₈Bi₁₀(S,Se)₂₃
Formula
—
Mineral Species
Entry type
—
Sulfosalts
Chemical class
—
Monoclinic
Crystal system
—
2–2.5
Mohs hardness
—
7.12
Specific gravity
—
Black
Streak
—
Metallic. R1 –R2: (400) 43.2–45.3, (420) 42.8–44.9, (440) 42.4–44.5, (460) 41.9–44.2, (480) 41.5–43.8, (500) 41.1–43.3
Luster
—
Good, giving platy appearance
Cleavage
—
C2/m
Space group
—
—
Structural group
—
Wit · Questionable
IMA
—
1924
Named in
—
Lead-gray; cream-white in reflected light
Typical colors
—
Pb · Bi · S · Se
Elements
—