- a very common mineral, calcium magnesium carbonate, CaMg(CO3)2, occurring in crystals and in masses.
- a rock consisting essentially or largely of this mineral.
- a white mineral often tinted by impurities, found in sedimentary rocks and veins. It is used in the manufacture of cement and as a building stone (marble). Composition: calcium magnesium carbonate. Formula: CaMg(CO 3) 2 . Crystal structure: hexagonal (rhombohedral)
- a sedimentary rock resembling limestone but consisting principally of the mineral dolomite. It is an important source of magnesium and its compounds, and is used as a building material and refractory
