Argille comuni e scisti argillose da costruzione (esclusi bentonite, argilla refrattaria, argille espanse, caolino e argille caoliniche); andalusite, cianite e sillimanite; mullite; terre di chamotte o di dinas
Common clays and shales for construction use (excluding bentonite, fireclay, expanded clays, kaolin and kaolinic clays); andalusite, kyanite and sillimanite; mullite; chamotte or dinas earths