slag

noun 0.564

gang

noun 0.562

ganga

noun 0.548

gunk

noun 0.542

host rock

noun 0.540

groundmass

noun 0.540

kankar

noun 0.535

galena

noun 0.525

garbage

noun 0.524

gravel

noun 0.522

coal

noun 0.517

ganging

noun 0.517

sludge

noun 0.513

culm

noun 0.512

skarn

noun 0.512

mineral coal

noun 0.510

mining

noun 0.510

fault gouge

noun 0.507

gunge

noun 0.506

gold mine

noun 0.504

dross

noun 0.502

bedrock

noun 0.502