Codsiga:Mashiinka kala-soocida qoyan ee qoyan ee giraanta toosan ayaa si weyn loogu isticmaalay kala-soocida qoyan ee macdanta birta magnetic daciifka ah sida hematite, limonite, siderite, chromites, limonite, wolfram iwm iyo sidoo kale kala-soocidda birta ee nadiifinta macdanta aan birta ahayn, sida quartz , feldspar, nightline, fluorite, kaolin iwm.