iron ore magnetic

- BIR - Bureau of International Recycling- iron ore magnetic ,Materials. Ferrous metals are mainly composed of iron and have magnetic properties. Steel, an iron alloy containing carbon, is by far the most-recycled material in the world.Antimatter Fuel - Atomic RocketsTechnically, it is the matter and antimatter subatomic particles that annhilate each other, not the atoms as such. Antimatter protons are called anti-protons, antimatter electrons are called positrons, and antimatter neutrons are called anti-neutrons.