Chemical Formula: Fe2O3 (Iron Oxide)
Class/Group: Oxides and Hydroxides: Spinel
Appearance: Black, gray to silver gray, brown to reddish brown, red, sometimes iridescent, opaque, metallic, known for red to reddish brown streaks.
Characteristics: Is paramagnetic, very brittle.
Hardness: 5.5 – 6.5
Specific Gravity: 4.9 – 5.3 (typical of metallic minerals)
Crystal Forms: Hexagonal, although occasionally scalenohedral and rhombohedral occur. Crystals occur in thin plates and splinters.
Often Found With: Albite, Barite, Biotite, Calcite, Magnesite, Magnetite, Pyrite, Quartz
Varieties: lodestone (large and magnetic), titano (titanium rich), chrome (chromium rich)

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Photos of the hematite