Hematite α–Fe2O3 Handbook of Mineralogy
Mineral Group: Hematite group. Occurrence: An accessory mineral in felsic igneous rocks, a latestage sublimate in volcanic rocks, and in hightemperature hydrothermal veins. A product of contact metamorphism and in metamorphosed banded iron formations. A common cement in sedimentary rocks and a major constituent in oolitic iron formations.