- Minerals, ground or otherwise treated (1)
- Clay, ground or otherwise treated (2)
- Graphite, natural: ground, pulverized, refined, or blended (4)
- Cat box filler (1)
- Perlite, aggregate or expanded (1)
- Pulverized earth (1)
- Silicon, ultra high purity: treated (1)
- Slag, crushed or ground (2)
