Photo: David Hospital · CC BY-SA 4.0

Mineral, marcasite group

Properties

Chemical formula

FeSe₂

Group

Sulfides

Crystal system

—

Hardness (Mohs)

—

Color

Metallic

Luster

—

Streak

Black

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

2.EB.10a

Dana classification

—

IMA status

Grandfathered mineral (G)

IMA symbol

Fse

Locality

—

Type locality

—

Discovery year

—

Source: Wikidata