Marble topic

Marble is a nonfoliated metamorphic rock resulting from the metamorphism of limestone, composed mostly of calcite (a crystalline form of calcium carbonate, CaCO3). It is extensively used for sculpture, as a building material, and in many other applications. The word "marble" is colloquially used to refer to many other stones that are capable of taking a high polish. The word "marble" derives from the Greek μάρμαρον (marmaron) and that from μάρμαρος (marmaros), "crystalline rock", "shining stone... full article at wikipedia