Wagner Equipment Co. is a full-service Metso distributor, offering equipment, services, and process solutions for contractors and recycling. Metso has a long history of manufacturing the best crushing and screening equipment for your needs. Partner with us today.For example, iron is magnetic so instruments measuring the changes in the magnetic field can give us clues as to where pockets of iron could be. Exploration methods are used to find, and assess the quality of mineral deposits, prior to mining. crushing the ore into a powder. This process of reducing the size of the rocks requires a lot of.