Jethrik was a blueish mineral that was a vital component for certain types of warp drive engines. Though harmless in its natural form, a handful of jethrik could power an entire starship. The scarcity of jethrik made it valuable: according to Garron, it was the rarest and most powerful element in the universe. They had smuggled a large quantity of jethrik into the city of Shur so that the Graff could see it. Unbeknownst to them, the jethrik was the first segment of the Key to Time. (TV: The Ribos Operation)