So, I once heard this theory that there was this counter-adonalsium and aluminum was it's god metal. However, no other god metals were actual metals seen in our universe. So then, I got to thinking. What metal does not exist in our universe, have both a strong connection to Adonalsium, and existed before the Shattering?
Listen, I am just saying I do not think it is a coincidence that Brandon Sanderson's company and the only book that Adonalsium is ever seen alive is called Dragonsteel.
Also, Side Theory: AdonalsIUM maybe Adonalsium is the god metal (unlikely) (felt the need to point it out)