About marble

Marble is a metamorphic rock, it used to be another type of stone, and then it was transformed by changing circumstances. Before marble becomes marble, it is the first limestone that forms on the shores and floors of tropical seas. Limestone is an accumulation of shells, shell fragments, microscopically tiny shells, and dissolved shells.

Depending on the conditions on a particular beach or sea, the sedimentary layer of limestone may be interrupted by occasional layers of clay or lenses of sand. But to a large extent, limestone is an assortment of shell remains that are made from the mineral calcite.
As a natural material, marble was widespread in the ancient period, and is associated with buildings from this era, but also with sculptures. It is used all over the world, so it is one of the most beautiful and luxurious buildings of all time – the Taj Mahal, completely carved from marble.
Pure white marble is formed by metamorphosis of very pure limestone. It may contain impurities of clay, sand, iron oxide or other substances, visible in the form of small veins or streaks. Such impurities can be recrystallized by intense pressure and heating.
The marble used in construction usually consists of calcite, dolomite and serpentine that can be polished. The texture of marble depends on its size, shape and uniformity of grains, which can be visible up to several millimeters, and therefore there are fine-grained and coarse-grained marbles, with uneven or uniform grain size.