Azoth

Azoth is a metal that resembles solid mercury. It is known as the metal that cannot be transmuted. It is about as strong as armandine, but exhibits a number of magical properties of which armandine has none, making it desirable to those with the means to work with it.
Azoth is the essential substance of transformation, used in many alchemical processes, and the chief substance exhibiting the effect of invisibility. It is used to coat metal or mixed as an alloy in armor, rings, etc. It is also ductile enough, when under proper conditions, to be threaded. Threading azoth is a prized skill in the alchemists capable of it.
==Sources==
https://en.wikipedia.org/wiki/Azoth
Category:Materials
Category:Metals
Category:Alchemy