Jethrik

Jethrik is a blueish mineral that is a vital component for certain types of warp drive engine. Though harmless in its natural form, a handful of Jethrik can power an entire starship. The scarcity of Jethrik makes it all the more valuable.

Knowing that the Graff Vynda-K needed Jethrik for his war efforts, two confidence tricksters, Garron and Unstoffe came to the primitive world of Ribos to swindle him. Garron offered to sell the planet to Garron and Unstoffe to pose as a native.

The pair hoped to convince the Graff Vynda-K to buy Ribos by convincing him that the planet had abundant mineral deposits of Jehrik, and that the natives, having no advanced technology, had no clue as to its value. To this end, Garron had Unstoffe pose as a native and tell a story about the abundance of "scryngestone" (a made-up, supposedly native name for Jethik) on the planet.

To this end, they had to smuggle a large chunk of Jethrik into a Ribos museum so that the Graff could see it. In reality, the chunk of Jethrik was the first segment of the Key to Time. (DW: The Ribos Operation)