Homeworld: Mimban

The legendary Kaiburr crystal is an archaeological relic found on the planet of Mimban. Mimban lore says that the god Pomojema used the crystal to heal the wounded. The priests of the Temple were said to have mysterious healing powers that stemmed from the crystal. The crimson gem had the ability to enhance Force powers. The crystal resided in the jungle Temple of Pomojema, guarded by a sluggish yet deadly lizard-creature.

Shortly after the Battle of Yavin, Luke Skywalker and Princess Leia Organa helped a Mimban local named Halla search for the crystal. Upon uncovering it, the Rebel heroes had to face Darth Vader before they could escape with their prize.

Removing the Kaiburr crystal from Mimban affected its mystical properties. Its power decreased in direct proportion to its distance from the temple. As such, the Kaiburr crystal became little more than a curiosity in Luke's possession, as he concentrated on the more pressing concerns of the Galactic Civil War. He would later use it as a teaching aid to his students in his Jedi Academy, and briefly experimented with using fragments of the gem as focusing crystals in lightsabers.