Marble is a non-foliated metamorphic rock composed of recrystallised carbonate minerals, most commonly calcite or dolomite.

Metamorphism causes variable recrystallisation of the original carbonate mineral grains.  The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals.  Pure white marble is the result of metamorphism of a pure limestone or dolomite protolith. 

The characteristic veins and swirls 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. 

Marble is commonly used for sculpture and as a building material.


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