The Holy Qur'an tells us that the iron was sent down to earth. Scientists have, only recently, come to discover the relevant facts about the formation of iron. Geologists believe that the entire energy of our solar system is not sufficient to produce even one atom of iron. Moreover, they state that four times as much energy as that of our solar system would be required to make one atom of iron on the surface of the earth. The geologists thus conclude that iron is an extraterrestrial material that was sent down to earth from some other planet. 

Who besides Allah could have such absolute knowledge/done such action, i.e. sending down iron to earth, which excels and encompasses all levels of human knowledge and might?? .!! For sure, no one can claim that.