mineral
Magnetite
Iron(II,III) oxide, Fe3O4
AI-generated identification · may be incorrectHardness is 5.5 to 6.5 on the Mohs scale. Color is black with a metallic to submetallic luster, and it has an isometric crystal system.
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Physical properties
Hardness is 5.5 to 6.5 on the Mohs scale. Color is black with a metallic to submetallic luster, and it has an isometric crystal system.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments through magmatic crystallization and hydrothermal processes.
Uses & applications
Used as a major ore of iron, in heavy media separation, and as a natural permanent magnet.
Geological facts
Magnetite is the most magnetic naturally occurring mineral on Earth and is sometimes called lodestone when magnetized.
Field identification & locations
Identified by its strong magnetism, black streak, and high density; commonly found in worldwide iron deposits and beach sands.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous