… blocks, tiles and other ceramic goods of siliceous fossil meals (for example, kieselguhr, tripolite or diatomite) or …
Explanatory notes
… Sub-chapter I GOODS OF SILICEOUS FOSSIL MEALS OR OF SIMILAR SILICEOUS EARTHS, AND REFRACTORY GOODS … usually mixed with binders (such as clay or magnesia) and sometimes with other substances (e.g., asbestos, hair, …