is a common rock-forming mineral. It is a calcium magnesium carbonate with a chemical composition of CaMg(CO3)2. It is the primary component of the sedimentary rock known as Dolostone and the metamorphic rock known as dolomitic marble. Limestone that contains some dolomite is known as dolomitic limestone. The most common use for dolostone is in the construction industry. an aggregate in concrete and asphalt, railroad ballast, rip-rap, or fill. Production of cement. It is used for acid neutralization in the chemical industry, production of glass, bricks, and ceramics.