China clay: soft white clay that is an essential ingredient in the manufacture of china and porcelain and is widely used in the making of paper, rubber, paint, and many other products
| Silica | 48-49% |
| Alumina | 34-35% |
| K2O + Na2O | 2% |
| LOI | 12-13 |
| Iron | 0.5-0.7% |