Jorium

Jorium is a rare crystal. Trace quantities of jorium may be found in Redstone III minerals.

It resonates at the same frequencies as some brain waves, and may be used to stimulate brain activity and produce psionic abilities in humans. Jorium is required to create spectres.

History
Before the outbreak of the Second Great War a Dominion freighter carrying jorium was hijacked by pirates.

Tosh hired Raynor's Raiders to mine high yield minerals on Redstone III. The Raiders accepted it as a typical mining operation for profit. The spectre did not mention the minerals' jorium content.