… otherwise, into blocks or slabs of a rectangular (including square) shape. …
Explanatory notes
… otherwise, into blocks or slabs of a rectangular (including square) shape (+). - Marble and travertine : … crystalline and either opaque or translucent. Marble is usually variously tinted by the presence of mineral oxides … layers of open cells. Ecaussine is extracted from various quarries in Belgium and particularly at Ecaussines. It is a …