Magnetite
Fe3O4
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Magnetite is one of the most magnetic of all naturally occurring minerals and is the most magnetic mineral commonly found on Earth. It is an important ore of iron and was used as an early form of compass (lodestone).
| Crystal System | Cubic (Isometric) |
| Mineral Class | 04 Oxides and Hydroxides |
| Mohs Hardness | 5.5-6.5 |
| Specific Gravity | 5.17-5.18 |
| Color | Black |
| Luster | Metallic |
| Streak | Black |
| Cleavage | None |
| Fracture | Conchoidal to uneven |
| Transparency | Opaque |
| Crystal Habit | Octahedral, dodecahedral, massive |
Mohs Hardness
Mohs Hardness: 5.5 – 6.5
1 Soft10 Hard
Crystal System
Cubic (Isometric)Explore on Science FYI
Frequently Asked Questions
What is the hardness of Magnetite?
Magnetite has a Mohs hardness of 5.5-6.5.
What crystal system does Magnetite belong to?
Magnetite crystallizes in the Cubic (Isometric) crystal system.
What color is Magnetite?
Magnetite is typically Black.
What type of luster does Magnetite have?
Magnetite exhibits a Metallic luster.
What is the chemical formula of Magnetite?
The chemical formula of Magnetite is Fe3O4.