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Home
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Mineral Encyclopedia
>> Mineral Photos >> Magnetite-Magnetite
Magnetite
Chemical
Formula
Fe2+Fe3+2O4
Species
Oxides & Hydroxides
Crystal
System
Isometric
Mohs
Scale
5-6
Specific
Gravity
5.17-5.18
Color
Black, gray with brownish tint in reflected light
Streak
Black[1]
Luster
Metallic, Sub-Metallic
Refractive
Index
n = 2.42
Diaphaneity
Opaque
Cleavage
Indistinct, parting on , very good
Fracture
Irregular/Uneven
Crystal Habit：
Octahedral, fine granular to massive
Geological Setting：
Common igneous accessory mineral. In sedimentary banded iron formations.
Magnetite6341
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