Soft ihe
Calcite, Dolomite, Kaolin, Barite, quartz, talc, zircon Aja, Wollastonite, Kol ntụ ntụ, Light Calcium Carbonate, Mica, Bauxite, Attapulgite, Brucite, Bentonite, garnet, Magnesite, Andalusite, Pyrophyllite, Potassium Feldspar, Diopside, Rectorite, Diatomite , Gypsum, Pearlite wdg
ike ihe
Carborundum, boron Carbide, White Corundum, Zirconia, Cerium oxide, elu okpomọkụ alumina, Silicon Nitride, boron Nnitride, Brown gwakọtara alumina wdg
Mụtakwuo