Nova Crystal
these precious gemstones were best known because they helped bankroll the first Death Star project for the Empire. Found on several planets, including Mygeeto, Krann, Sarka, and Cotellier, nova crystals were highly-agitated gemstones which had a unique crystalline matrix. This matrix, when exposed to bright sunlight (especially in the red color band), absorbed the heat from the light and became excited. This allowed the gemstone to glow with its own luminescence, providing a ready light source. If not refrigerated after their removal from the rocky matrix, the crystals could explode with incredible force.