Pastillion ore/Legends

"a simple grip, a curved approach, one inlaid with the bone of the Cartusion whale, pastillion ore or black onk."

- The options given for lightsaber design by Huyang

Pastillion ore was a substance which could be used as an inlay in the handle of lightsabers. During the Clone Wars, when the Jedi training cruiser Crubcible was visted by a group of Jedi Padawans, the Architect droid Huyang who was stationed there informed them that a pastillion ore infused handle was an option they could select when constructing their own lightsabers.

Behind the scenes
Pastillion ore was first mentioned in 2012 in A Test of Strength, the seventh episode of the fifth season of Star Wars: The Clone Wars, the script for which was written Christian Taylor. The substance was also mentioned in the trivia gallery for the episode on StarWars.com.