... , nickel, tungsten, zinc, molybdenum, magnesium, copper, rare metal, alloy, metallic oxide Non-metallic powders Talc, kaolin, calcium carbonate, coal, fluorescent, brucite ... , clay, graphite, quartz, plaster, bentonite, diatomite, zirconium silicate, corundum, mica, titanium oxide Other powders Soil, pigment, sulfur, explosive, western medicine, Chinese medicine ...