[Source] Marilite was a type of gemstone that could be used as an energy source. Around the time of the Cold War between the Galactic Republic and the Sith Empire, crystals for lightsabers and blasters were sometimes made using marilite, which was also used in the construction of other weapon components. Around 18 BBY, a Jedi Knight named Jax Pavan hoped to get a crystal for building a lightsaber from one of Baron Vlaçan Umber's Ves Volette light sculptures, thinking that the sculpture could be powered with marilite. However, Baron Umber adamantly refused Pavan's request due to the fact that a light sculpture would be destroyed if its crystal was removed.