Hematit

Chemical Composition: Fe2O3
Crystal System: Trigonal
Crystal Form: Generally thin or thick plate-like crystals, rhombohedral, pyramidal and rarely prismatic.
Twinning: The penetration twin is typical.
Hardness: 5 - 6
Specific Gravity: 5.26
Color and transparency: Steel gray-black, opaque Line Color, Red-reddish brown Gloss, Metallic


Distinctive Features: Red line color and hardness, crystal shape are its distinguishing features.

 

Occurrence: Widely found, hematite is an important iron mineral. It can be found in hydrothermal veins and igneous rocks as an accessory mineral. It can commonly occur in volcanic rocks, many metamorphic rocks, contact metamorphic deposits, primary or secondary sedimentary rocks.