Niguliam
A rare material located in the depths of the sub surface oceans of outer solar system moons and dwarf planets such as Europa, Callisto, Ganymede, Titan, Enceladus, Triton, Pluto, Charon, Haumea, Makemake, and Eris.
Niguliam is extremely rare but it is one of the strongest and useful materials in the known universe.