Hematite is processed to produce iron which is used to make steel which, in turn, is used in everything from automobiles to flatware to the machinery used to make almost everything else we use. Many different minerals can be combined with iron in producing steel. Each provides a different set of valuable properties to the finished product. A familiar example is stainless steel. Steel is used in the manufacture of such things as kitchen appliances, furniture, tools, bridges, buildings, automobiles, construction equipment, manufacturing machinery, highway construction, shipbuilding, trains, railroads etc.
Powdered iron is used in magnets, high-frequency cores, auto parts, and as a catalyst.
Iron blue is used in paints, printing inks, plastics, cosmetics, paper dyeing. Black iron oxide is used as a pigment and in polishing compounds, medicines and magnetic inks. The other primary ore of iron is magnetite . Kaolinite Kaolinite is a very fine, white clay used as a filler in many products, for coating pages in magazines and newspapers to prevent ink from running, and as a whitener and abrasive in toothpaste. Limestone Limestone is used as dimension stone in buildings and as a component of cement which is used in the construction of everything from homes and sidewalks to bridges and skyscrapers.