Clays are silicoaluminate raw materials, and are among the most abundant minerals in the earth crust.
Las arcillas son compuestos a base de silicoaluminatos, los cuales son las materias primas más abundantes en la corteza terrestre.
As argilas são compostos a base de silicoaluminatos, as quais são as matérias-primas mais abundantes na crosta terrestre.