… Marble, travertine, ecaussine and other calcareous monumental or building stone of an apparent specific gravity of 2.5 or more, and alabaster, whether or not …
Explanatory notes
… 25.15 ‑ M arble, travertine, ecaussine and other calcareous monumental or building stone of an apparent specific gravity of 2.5 or more, and alabaster, whether or not … onyx marble, etc.), but there are pure white varieties. Travertines are varieties of calcareous stone containing …