Blue Mortal Crystal

Blue Mortal Crystal is prototype color crystal. It can be crafted or obtained by Jedi Knights from the level 26 mission Desert Duel, on the planet Tatooine.

Source
Blue Mortal Crystal is an item that can be crafted by Artificers. It is also received in the mail if the Jedi Knight chooses to turn Lord Praven to the light side of the force in the mission.