A compressed energy crystal, also called compressed crystals and abbreviated CEC, was a type of lightsaber crystal. CECs were also the central component in Ves Volette's light sculptures. Removing the crystal from a sculpture would result in the collapse of the gaseous light within. Certain compressed crystals, when used in lightsabers, caused the energy blade to take on a peculiar "pulsating" appearance with a thinner core. Lightsaber blades created by compressed crystals appeared to be more precise than normal blades.
Compressed energy crystals included but were not limited to Luxum, Ilum and Adegan crystals, and Corusca gems.