Adgean Crystal

Adgean Crystals were used by the Jedi to focus the blade of thier Lightsaber. Two crystals next to each other were use for a lightsaber of interchangeable lengths. The Sith used synthetic crystals that they created in a self-built furnace. Four of these crystals, placed at opposite ends the lightsaber, formed the difficult to handle double-bladed lightsaber, such as the one used by Darth Maul. This form of lightsaber was invented by Exar Kun.