Fullers earth
Minerals
Niobium ore , molybdenum ore
Manganese ore and chrome ore
Nickel ore
Manganese ore
Minerals
Manganese ore
Fenb a material
Minerals
Minerals
White asbestos chrysotile
Coal, mineral ore
Molasis
Minerals
Synthetic graphite, iron pyrite, natural graphite, tin and antimony sulphite
Minerals
Minerals & solvents.
Zinc ash.
Soft ferrite core