Iron oxide

Iron oxides are chemical compounds. There are sixteen known iron oxides. Iron oxides are used in pigments. It is used in both man-made and natural pigments.

Venetian red (haematite), Magnetite (Fe3O4), or a mixture of oxides make black or purple pigments. The umber, sienna and ochre are oxides or hydrated oxides of a yellow to chestnut colour.

Most iron oxide is mined as iron ore. Every year millions of tons go into blast furnaces to make iron.

Various iron oxides[change | change source]