Dolovite mines of Mustafar

The dolovite mines of Mustafar contained tunnels that were guarded by the roggwart Kongo against xandanks and lava eels. The mines were located on the volcanic mining planet Mustafar; under the heavy guard of the Galactic Empire, mining operations there eventually ceased by the time of the Galactic Civil War. While Kongo enjoyed killing the giant eels with his bare hands at the dolovite mines, he became a gladiator at the Grakkus Arena on Nar Shaddaa by 0 ABY. In that year, an announcer of Grakkus's arena detailed the roggwart's work at the mines while the beast, dubbed "Kongo the Disemboweler," was released to combat the Jedi-in-training Luke Skywalker.

The dolovite mines of Mustafar were mentioned in the eleventh issue of the comic series Star Wars, written by Jason Aaron and published by Marvel Comics on November 4, 2015.