32950 - Minerals & Earths, Ground or Otherwise treated
3295011 - - Minerals & Earths, Ground or Otherwise treated: Lightweight aggregate (Such as diatomaceous earth, Expanded clay, Expanded slag, Cinders, Perlite, Haydite, Pumice
3295013 - - Exfoliated vermiculite: Aggregate
3295015 - - Exfoliated vermiculite: other (Such as loose fill insulation, Acoustical, etc.)
3295020 - - Refractory magnesia + Dead-burned magnesia or Magnesite
3295023 - - Dead-burned magnesia or Magnesite: Direct use as finished refractory products
3295025 - - Dead-burned magnesia or Magnesite: Refractory raw material
3295031 - - Crushed slag
3295061 - - Crushed & Ground uncalcined gypsum + Gypsite & Anhydrite
3295081 - - Natural graphite, Ground, Refined, or Blended
3295084 - - Ground crude fire clay, High alumina clay & Silica fire clay
3295085 - - Clays artificially activated with acid or other Materials
3295086 - - Mica, Ground or Treated
3295093 - - Talc, Steatite, Soapstone & Pyrophyllite, Ground or Otherwise treated
3295094 - - Talc, Steatite, Soapstone & Pyrophyllite, Ground or Otherwise treated
3295098 - - Minerals & Earths, Ground or Otherwise treated + Feldspar, Roofing granules & Ground borite
3295099 - - Refractory magnesia + Dead-burned magnesia or Magnesite (Miscellaneous)
3295XX0 - - Minerals, Ground or treated (Miscellaneous - Volume)
3295XX2 - - Minerals, Ground or treated (Miscellaneous - Speciality)