This class includes:
——mining of natural phosphates and natural potassium salts
——mining of native sulphur
——extraction and preparation of pyrites and pyrrhotite, except roasting
——mining of natural barium sulphate and carbonate (barytes and witherite), natural borates, natural magnesium sulphates (kieserite)
——mining of earth colours, fluorspar and other minerals valued chiefly as a source of chemicals

This class also includes:
——guano mining

This class excludes:
——extraction of salt, see 0893
——roasting of iron pyrites, see 2011
——manufacture of synthetic fertilizers and nitrogen compounds, see 2012