… Marble, travertine, ecaussine and other calcareous monumental or building stone of an apparent specific gravity …
Explanatory notes
… 25.15 ‑ M arble, travertine, ecaussine and other calcareous monumental or building stone of an apparent specific gravity … open cells. Ecaussine is extracted from various quarries in Belgium and particularly at Ecaussines. It is a bluish‑grey … The heading also excludes : (a) Serpentine or ophite (a magnesium silicate sometimes called marble) ( heading 25.16 …