General Information:
Chemical Formula:
Fe2O3
Composition:
(Molecular Weight = 159.69 gm)
Iron 69.94 % Fe
Oxygen 30.06 % O
Empirical Formula:
Fe3+2O3
Environment:
Magmatic, hydrothermal, metamorphic and sedimentary.
IMA Status:
Accepted IMA 1980
Locality:
Matto Grosso, Brazil. Mesabi iron ore range, Minnesota, USA.
Name Origin:
From the Greek, haimatites, "bloodlike'" in allusion to vivid red color of the powder.
Physical Properties:
Cleavage:
None
Color:
reddish gray, black, or blackish red.
Density:
5.3
Diaphaniety:
Subtranslucent to opaque
Habits:
Tabular - Form dimensions are thin in one direction., Blocky - Crystal shape tends to be equant (e.g. feldspars)., Earthy - Dull, clay-like texture with no visible crystalline affinit ies, (e.g. howlite).
Hardness:
6.5 - Pyrite
Luminescence:
None.
Luster:
Metallic
Streak:
reddish brown
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