- Minerals, ground or otherwise treated (2)
- Mica, ground or otherwise treated (1)
- Clay for petroleum refining, chemically processed (1)
- Clay, ground or otherwise treated (4)
- Diatomaceous earth, ground or otherwise treated (1)
- Perlite, aggregate or expanded (4)
- Vermiculite, exfoliated (2)
- Slag, crushed or ground (3)
