A Velmorite crystal. Velmorite crystals, exclusively located on the world of Velmor, were utilized in the creation of yellow lightsaber crystal. While they were primarily employed in crafting Velmorite energy swords of exceptional quality, it's undeniable that they possessed the potential for diverse uses.
This particular crystal, when incorporated into a lightsaber, resulted in a slender and refined blade, enabling elegant and seamless movements during combat.