Red haematite was mined in Dodge county before 1854; in 1877 the deposits in Florence (disambiguation)|Florence county were first worked, and in 1882 276,017 tons were shipped from that county; and about 1884 began the development of the Gogebic deposits in Iron and Ashland counties.
Enclosures of other minerals (rutile, chlorite, haematite, gothite, actinolite, asbestos and many others) are extremely frequent in crystals of quartz.
The richness of the ore (about 30% of metal) is by no means so great as the red haematite ore found in Cumberland and north Lancashire (Furness district, &c.).
Iron is widely diffused, principally in the form of magnetite, brown haematite, limonite and bog iron.
HAEMATITE, or Hematite, a mineral consisting of ferric oxide (Fe203), named from the Greek word -aiµa, "blood," in allusion to its typical colour, whence it is called also red iron ore.