We know a lightsaber can't cut through everything in the Star Wars universe, but I would like to know all known metals/materials that a lightsaber can't cut through (in the sense can't cut in two halves or at least penetrate it). For the sake of convenience I am reducing the answers to the live action movies/tv-shows and legends comics only.
I am not asking whether there is something lighsabres cant cut, I know there are many things a lighsabre cant cut, what I am asking is the names of all known metal/materials it cant cut thorugh.
