Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly Limestone or Dolomite rock. Metamorphism causes variable recrystallization of the original carbonate mineral grains.
The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals. Primary sedimentary textures and structures of the original carbonate rock (protolith) have typically been modified or destroyed.
Pure white marble is the result of metamorphism of a very pure (silicate-poor) Limestone or Dolomite protolith. The characteristic swirls and veins of many colored marble varieties are usually due to various mineral impurities such as clay, silt, sand, iron oxides, or chert which were originally present as grains or layers in the Limestone.
Green coloration is often due to serpentine resulting from originally high magnesium limestone or dolostone with silica impurities. These various impurities have been mobilized and recrystallized by the intense pressure and heat of the metamorphism.
Greater care must also be taken during installation as other construction defects easily taint the pureness of marble, particularly from underlying materials, and may result in staining at a later date. It is common to use marble with a highly polished surface finish and, as a consequence, slip resistance should be carefully considered.
Take a look through some of the colour variations available.