Did you know? Through fossilization, bones can literally turn to stone, and through pyritization they can also turn to iron fossils, which is rare but it does happen by replacing bones with iron minerals.
Quran: And they say, "When we are reduced to bones and ashes, will we really be raised as a new creation?" Say, "Yes, even if you become stones, or iron. (Surah Isra, 17:49-50)