An alloy of conventional metals , blended with pure magic. Each little piece of pyreal includes mana in the form of physical matter.
Pyreal is...
Think of it as our little dance with E=MC2. Mana is obviously a peculiar form of noncorporeal energy, moving at lightspeed. If you can slow it down somehow, it becomes matter with unique properties. Then you can blend it with other forms of matter, into an alloy. In this case, we call it pyreal.