The elements on earth and elsewhere are recycled. Many atoms have been cycled millions of times. We are all made of recycled star stuff
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The Donald say: It is true that every element comes from exploding stars or supernovas. Some stars send out more of certain elements than others. We live on a planet with an iron core. We are made of the same things as everything else. If you believe in evolution, then one celled amoebas eventually became man. If you believe in God, then He made us from the dust of the Earth.
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Mutt say: Iron is created in stars that are more massive than our sun. Stars the size of our sun are not big enough to generate the heat needed to produce iron.
A star generates energy through nuclear fusion, combining hydrogen atoms to form helium, which releases energy. The energy is trying to escape while the gravity of the mass of the star is trying to pull inward. As it's burning hydrogen, the core gets smaller and small, which heats it up more and more, until eventually it starts fusing helium atoms into carbon. As it continues to get smaller and heats up more, the it fuses carbon to form heavier elements such as oxygen, neon, silicon, up to iron, which it can no longer fuse, and the core collapses. The iron heats up fusing protons and electron, forming neutrons. The outer layers fall inwards to the core because of gravity, which crushes it even more, heating it up until it can no longer hold it, and it explodes into a supernova, throwing all that material in the star out into space. Some supernovae have enough energy that the explosion creates heavier elements above iron. All that gas and debris thrown out sits around until some type of gravity disturbance happens (like a star passing by or a shockwave from a supernova), which starts the cloud rotating, pulling the gases inward until it is under so much pressure that it "ignites" into a star, starting the process all over again. The spinning star collects matter from the former star into an orbit that coalesces into the planets, moons, asteroids, and comets.