Mineral 1.0: Hematite (massive)

Mineral 1.0

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Hematite (massive)  (Haematite)Fe₂O₃

Class: Oxide
Hardness: 5 - 6
Density: 5.3
Streak: Deep red
Lustre: Earthy
Habit: Very fine grained aggregate of red crystals.
Colours: Deep red
   Crystal System: Hexagonal
Cleavage: None
Fracture: Subconchoidal
Magnetism: Weak
Reaction with HCl: Unknown
Identification in hand sample:
Deep red streak and earthy lustre are indicative. SG may also be indicative.
Associations:
Produced by weathering or hydrothermal alteration of iron-bearing minerals. May be found in some syenite, trachyte, granite and rhyolite.
Industrial / ecomonic uses:
Important ore or iron, sometimes used as a gemstone.
Comments:
May become magnetic when heated.



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