This article discusses the transformation from an organic to a mineral energy system from a Swedish historical perspective. Main arguments are that there was a dynamic interaction between the two systems during the Swedish industrialization process. For one, a diffusion of the mineral energy system contributed to opening previously inaccessible organic resources in the forest of northern Sweden. Secondly, the development of the pulp- and paper industry contributed to the switch from charcoal to coke in the iron industry. Thirdly, the development of hydropower, itself an organic source of energy, further contributed to the emergence of a mixed energy system. One can therefore see the Swedish transition from an organic to a mineral energy system as a shift from a traditional organic energy system to an industrialized organic energy system, which is to say an organic energy system which for its operation was depending on technologies and organizational structures of the mineral energy system.