Dolomite, also known as Dolostone and Dolomite Rock, is a common rock-forming mineral. It is a sedimentary rock composed mostly of the mineral dolomite, calcium magnesium carbonate with a chemical composition of CaMg(CO3)2. 
 
Dolomite is found in sedimentary basins around the world. It is possibly formed by the post-physical, chemical and biological processes alteration of lime mud and limestone by magnesium-rich groundwater. Limestone that contains some dolomite is known as dolomitic limestone.
 
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