… stone of an apparent specific gravity of 2.5 or more, and alabaster, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape. …
Explanatory notes
… stone of an apparent specific gravity of 2.5 or more, and alabaster, whether or not roughly trimmed or merely cut, by … Travertines are varieties of calcareous stone containing layers of open cells. Ecaussine is extracted from various … (quarry stones, waste from sawing, etc.), but only if large enough to be used for cutting or construction. …