We need more fun uses for bones. Historically speaking the Scandinavians did collect iron ore from various bogs (makes sense we get it in the swamps) but also they were also unwittingly making rudimentary steel as well. Human and animal bones could be found near forge locations. Though their reason for using bones in smithing was more 'mystical' it did add some carbon to the process resulting in less refined steel. Also, bone broth is yummy, we have root veggies in the game, wouldn't be hard to combine the two.