Zeolitic ore
Zeolitic ore was a valuable substance found in asteroids. 

In 2377, the  mined a quantity of high-grade zeolitic ore, which Captain Kathryn Janeway proposed to trade to the Annari for deuterium injectors. The deal fell through after the Annari found Voyager crew members helping their enemies, the Kraylor. ()

de: Zeolithisches Erz
Materials
Geology