- Magnesite, crude: ground, calcined, or dead-burned (1)
- Clay, ground or otherwise treated (3)
- Desiccants, clay: activated (2)
- Graphite, natural: ground, pulverized, refined, or blended (3)
- Pulverized earth (1)
- Blast furnace slag (1)
- Foundry facings, ground or otherwise treated (2)
- Slag, crushed or ground (11)
