Photo: Robert M. Lavinsky · CC BY-SA 3.0

Spinel, oxide mineral

Properties

Chemical formula

NiFe³⁺₂O₄

Group

Oxides

Crystal system

Cubic

Hardness (Mohs)

—

Color

Black

Luster

—

Streak

Brown

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

Fd-3m

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

4.BB.05

Dana classification

7.2.2.5

IMA status

Grandfathered mineral (G)

IMA symbol

Trv

Locality

🇿🇦 Bon Accord nickel deposit

Type locality

—

Discovery year

—

Source: Wikidata