Dolomite, also known as "dolostone" or "dolomite rock," is a sedimentary rock composed primarily of the mineral dolomite, CaMg (CO3)2. Dolomite and limestone are very similar rocks. Both are crushed and cut for use as construction materials and to neutralize acids. It is composition of calcium magnesium carbonate. It is found in white, pinkish and bluish color. Its chemical formula is CaMg(CO3)2.