VS
Name
—
Pb₃CuBi₇(S,Se)₁₄
Formula
—
Mineral Species
Entry type
—
Sulfosalts
Chemical class
—
Monoclinic
Crystal system
—
2–2.5
Mohs hardness
—
7.12
Specific gravity
—
—
Streak
—
—
Luster
—
Good, parallel to crystal elongation
Cleavage
—
P2_1/m
Space group
—
—
Structural group
—
Nsm · Approved
IMA
—
1978
Named in
—
Lead-gray; white with a gray tint in reflected light. Anisotropism: Dark gray to brown. R1 –R2: n.d
Typical colors
—
Pb · Cu · Bi · S · Se
Elements
—