Ore

Ore was a type of rock.

Peladon was where the Galactic Federation mined most of its trisilicate ore. (TV: The Monster of Peladon)

Sandminers like Storm Mine 4 mined and processed ore. SV7 discovered the Fourth Doctor inside a hopper on Storm Mine 4, having viewed readings that displayed impurities in the ore it contained. (TV: The Robots of Death)

Diloona was the ore that powered Craxon spacecraft. (COMIC: The False Planet)

Elesium ore was used as a component in the fuel that blasted a ship into hyperspace. (AUDIO: The Prisoner's Dilemma)

The planet Varos was a major source of Zeiton-7 ore. (TV: Vengeance on Varos)