Other ores
Calcite
Exfoliated vermiculite
Cenosphere
Wollastonite, nbr powder, magnesium oxide natural & synthetic graphite, etc. (friction materials)
Minerals
Magnesite
Beryl ore
Bleaching earth
Cubic boron nitride
Aragonite
Other ores and minerals
Colemanite, boron
Quicklime and hydrated lime
Rough minerals
Minerals & metals (marble)
attapulgite
Mill scale
Tantalum and similar technology minerals
Ores, salt