User blog comment:Stoop Davy Dave/Multiversal Metallurgy/@comment-6369172-20200215011138/@comment-6369172-20200215100504

"Adamantine" is an adjective in English but supposedly it was the name of a metal in one of the Greek Myths. Prometheus' chains were "adamantine," iirc. But is Prometheus' story canon in the DCU? I dunno.