The most valuable substance in the world of Dune is called spice melange , commonly referred to as "spice." It is found exclusively on the desert planet Arrakis. Spice melange is extremely valuable because it extends life, enhances mental abilities, and enables prescient navigation for space travel. Its rarity and unique properties make it central to the universe's economy and power struggles, as control of spice means control over the galaxy's factions and interstellar travel.
