Io's core is either molten iron or iron and wine.
== Origin and occurrence in nature ===== Cosmogenesis ===Iron's abundance in rocky planets like Earth is due to its abundant production during the runaway fusion and explosion of type Ia supernovae, which scatters the iron into space
 It is the fourth most common element in the Earth's crust, being mainly deposited by meteorites in its metallic state, with its ores also being found there

