Iron ores matombo uye zvicherwa umo simbi yesimbi inogona kutorwa mune zvehupfumi. Zvicherwa zvinowanzo fuma mu iron oxides uye inosiyana muruvara kubva ku grey, kupenya yero, yepepuru yakadzika, kusvika ku tsvuku ine ngura. Iyo iron pachayo inowanzowanikwa muchimiro chemagnetite (Fe3O4), hematite (Fe2O3), goethite, limonite kana siderite. Hematite inozivikanwawo se "natural ore". Iri zita rinoreva makore ekutanga emigodhi, apo mamwe maore ehematite aive ne66% iron uye yaigona kupihwa yakananga mumoto unoputika. Iron ore ndiyo mbishi inoshandiswa kugadzira simbi yenguruve, inova imwe yemidziyo mikuru yekugadzira simbi. 98% yesimbi yakacherwa inoshandiswa kugadzira simbi.

Iron ore yeMinnesota yakanyatso kuwanikwa apo vaongorori vaitsvaga goridhe. Sezvo chinhu chavaitsvaka chaiva ndarama, simbi yacho haina kucherechedzwa. Zvakazoitika kuti simbi yaizove yakakosha kuchamhembe kweMinnesota pane shoma shoma yegoridhe yakawanikwa.

Iron ore yakawanikwa pazvikamu zvitatu zvesimbi panguva dzakasiyana. Ore yekutanga kutumirwa kubva kuVermilion Range yaive muna 1884, Mesabi Range muna 1892, uye Cuyuna Range muna 1911.