Minerals are naturally occurring solid substances that have a characteristic internal structure and properties. They are formed through geological processes that take millions of years. Examples of minerals are: 1. Iron ore: farming implements, rails of railway track 2. Manganese: medicines, electrical appliances 3. Bauxite: airplanes, transport vehicles, electric wires 4. Copper: radios, telephones, vehicles, kitchen utensils, statues 5. Mica: ayurvedic medicines, dyes, electric machines and equipment, wireless communication equipment.