Dolomite, Mica Powder, Fluorspar, Silica Powder (quartz), Pyrophyllite.
Talc powdered, calcium carbonate, quartz.
Tantalite, Iron, ,Niobium,, Tin And ,manganese .
Ores like copper, tantalum, tin, lead, cobalt, cerium, molybedum, titanium, rutile, illmenite, manganese.