NAICS 327992 — Ground or Treated Mineral and Earth Manufacturing 
BEA sector: Ground or treated mineral and earth manufacturing
Activity: Barite processing beyond beneficiation
Activity: Barium processing beyond beneficiation
Activity: Blast furnace slag processing
Activity: Desiccants, activated clay, manufacturing
Activity: Diatomaceous earth processing beyond beneficiation
Activity: Feldspar processing beyond beneficiation
Activity: Flint processing beyond beneficiation
Activity: Fuller's earth processing beyond beneficiating
Activity: Graphite, natural (e.g., ground, pulverized, refined, blended), manufacturing
Activity: Kaolin, processing beyond beneficiation
Activity: Lead, black (i.e., natural graphite), ground, refined, or blended, manufacturing
Activity: Magnesite, crude (e.g., calcined, dead-burned, ground), manufacturing
Activity: Mica processing beyond beneficiation
Activity: Perlite aggregates manufacturing
Activity: Perlite, expanded, manufacturing
Activity: Pumice (except abrasives) processing beyond beneficiation
Activity: Pyrophyllite processing beyond beneficiation
Activity: Shale, expanded, manufacturing
Activity: Silicon, ultra high purity, manufacturing
Activity: Talc processing beyond beneficiation
Activity: Vermiculite, exfoliated, manufacturing