… 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 … by the presence of mineral oxides (coloured veined marble, onyx marble, etc.), but there are pure white varieties. … working (quarry stones, waste from sawing, etc.), but only if large enough to be used for cutting or construction. …