Compressed energy crystal
From Wookieepedia, the Star Wars wiki.
A compressed energy crystal, 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.
Compressed energy crystals included but were not limited to Luxum, Ilum and Adegan crystals, and Corusca gems.
