Potash feldspar powder, feldspar powder
Sodium feldspar powder, feldspar powder
Potassium feldspar, feldspar
Potassium and sodium feldspar
Coal, anthracite, white clay, feldespar
Ball clay, kaolin, silica sand, feldspar
Mineral sands, feldspars, woolastonite, manganese, chrome, iron oxides
Kaolin, feldspar clay, sand
Raw phosphate, talc powder, feldspar
Mica powder, china clay powder, ball clay powder, feldspar powder, quartz powder.