Marble

**Petrology and Genesis:** Marble is a non-foliated metamorphic rock composed of recrystallized carbonate minerals (calcite, dolomite) associated with quartz, graphite, limonite, hematite and organic substances.

**Info:** The characteristic veins of many coloured 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. These various "impurities" have been mobilized and recrystallized by the intense pressure and heat of the metamorphism. Marble is commonly used for sculpture and as a building material.

## Keywords
stone