Compare Minerals

Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.

Mineral A

Mineral B

Polybasite

Name

—

[Ag₉CuS₄][(Ag,Cu)₆(Sb,As)₂S₇]

Formula

—

Mineral Species

Entry type

—

Sulfosalts

Chemical class

—

Monoclinic

Crystal system

—

2–3

Mohs hardness

—

6.1

Specific gravity

—

Black

Streak

—

Metallic

Luster

—

Imperfect on {001}

Cleavage

—

P-3m1

Space group

—

Polybasite

Structural group

—

Plb · Approved

IMA

—

1829

Named in

—

Iron-black; in polished section, very pale gray with rare red internal reflections

Typical colors

—

Ag · Cu · S · Sb · As

Elements

—