Crystal skull

The crystal skull was the skull of an alien creature. The Trandoshan hunter Garnac owned one such skull and kept it on his Ubrikkian Floating Fortress, located on the moon Wasskah.

Behind the scenes
The crystal skull was the focus of the Indiana Jones movie the Kingdom of the Crystal Skull, created in 2008, and also produced by George Lucas. The skull has the same design as its appearance in the movie.