all-raw-material-for-talcum-powder - Tshwane . Talc - Wikipedia. Talc or talcum is a clay mineral composed of hydrated magnesium silie with the chemical formula H 2 Mg 3 (SiO 3) 4 or Mg 3 Si 4 O 10 (OH) 2.In loose form, it is (in ratio with or without corn starch), one of the most widely used substances known as baby powder
Read More