Compare Minerals

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

Mineral A

Mineral B

Putzite

Name

—

(Cu,Ag)₈GeS₆

Formula

—

Mineral Species

Entry type

—

Sulfides

Chemical class

—

Cubic

Crystal system

—

3–3.5

Mohs hardness

—

5.778

Specific gravity

—

Black

Streak

—

Metallic

Luster

—

One direction distinct in polished sections

Cleavage

—

F-43m

Space group

—

Argyrodite

Structural group

—

Pzi · Approved

IMA

—

2002

Named in

—

Iron-black with a violet tint; pale rose to pale violet in plane- polarized reflected light

Typical colors

—

Cu · Ag · Ge · S

Elements

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