Pyronium

Pyronium was a gem with a strange and interesting property: when exposed to light, it glowed and turned from black to white; cycling through the color spectrum. Jax Pavan was known to have a large and unflawed piece of it, given to him by Anakin Skywalker while he was still a Jedi Padawan.

Appearances

 * Coruscant Nights I: Jedi Twilight