Shroomsteel
Mohs hardness: 0,7
Electric resistance: None
Mass: 0,5kg/liter
Shroomsteel is a mysterious alloy produced by the Truffles.
It is extremely light and soft. It is almost 3 times softer than lead. It is a superconductor, which is why the Truffles use it to make electronical devices, and to trade with other civilizations.
It is made with mysterious technology that no other race has the knowledge of.
It is extremely reflective, reflecting even better than the best mirrors made by the Humans.