Fe3O4Cubic
Magnetite
Fe3O4
OxidesChemical FormulaFe3O4
Crystal SystemCubic
Mohs Hardness6
Specific Gravity5.17
ColorBlack
LusterMetallic to submetallic
StreakBlack
CleavageNone
FractureConchoidal to uneven
Occurrence
Found in igneous and metamorphic rocks. Naturally magnetic. Important iron ore.