Mined-over matter is a term used to describe materials that have been extracted from the earth through mining. ORE, Ores, DATA, and Ironore are all examples of mined-over matter. ORE is a mineral or aggregate of minerals from which a valuable constituent, such as a metal, can be profitably extracted. Ores are rocks or minerals from which a valuable substance, such as a metal, can be extracted. DATA is information that has been collected and organized for analysis or reference. Ironore is a type of ORE that contains iron.