Ilum

Ilum is a snow-covered uninhabited planet in the Unknown Regions of the galaxy. Ilum has a unique core of pure kyber, and a high concentration of kyber crystals throughout its vast caverns and its crust. For thousands of years, Ilum has been the site of the Gathering, a tradition of the Jedi Order in which a groups of younglings meditate and later obtain the kyber crystals they will use to construct their lightsabers.

In 32 BBY, Newt Liryas travelled to Ilum with Grand Master Yoda and several other younglings for the Gathering. While there, he was nearly overcome with fears of a great darkness overcoming the rest of the younglings; he later related this vision to Yoda. The crystal he found was green. After taking Teresa Kraifech as his Padawan, Newt reflected on his experiences during the Gathering.

In 28 BBY, Teresa Kraifech travelled to Ilum with Jedi Master Plo Koon and several other younglings for the Gathering. The crystal she found was blue.