lignite Synonyms

wood coal brown coal graphite garnet fluorite feldspar emery crystal cryolite jet steam coal loellingite ludlamite ludwigite mineral litharge diatomite fluorspar coking coal corundum coke cobalt boron bauxite barite azurite asphalt asbestos aragonite anthracite brimstone brookite coal clay chromite chlorite charcoal chalcedony carbon calcite alabaster