Marble is a crystalline-granular metamorphic carbonate rock, a product of recrystallization of limestone, less often dolomite. Due to the close adhesion of calcite grains to each other, the rock is well polished. In engineering and construction, marble is any carbonate rock that can be satisfactorily polished — limestone, dolomite or marble. Metamorphism of pure limestone leads to the formation of marble, since the only possible change in calcite at high pressures and temperatures is its recrystallization. At least partial recrystallization of calcite can occur without the participation of dynamometamorphism, and in some ancient strata limestones were turned into marbles without the influence of diastrophism.