Kyber Crystal
(Saber Crystal)
At the heart of every Jedi lightsaber is a kyber crystal found on
several planets, most notably the icebound caves of Ilum. This
crystal is attuned to the Force, and connected to a Jedi Knight on a
deeply personal level. In this way, a lightsaber is an extension of a
Jedi's Force awareness. Because Jedi let the Force guide their
selection of the crystal, the vibration that the crystal creates in
the lightsaber blade helps Jedi center themselves and find balance in
the Force. In this way, a Jedi can center his or her attention beyond
the distractions of combat. A lightsaber crystal is colorless until
first attuned and connected to a Jedi -- at which times it glows
either blue or green, or in some rare instances, another shade. From
that point on, it retains that hue.