Cinder: the hardened crust of the energy of fire. It is separated from iron by slaying it with a hammer (or earthquake), at which point it appears to be a different article. It isn’t. It is bound to its source by the energy that separated it. For this reason, the ancient smiths were considered sacred. They walked a bridge of energy at all times, in hazard.
Cinders from Nazko Cone in the Anaheim Volcanic Belt, Central British Columbia (Right)