In general, marble is one of the most beautiful and diverse building stones, which is divided into three categories: crystal, cloud and porcelain. The higher density of this stone causes it has had a high quality and durability.
Gray and black colors in marble are due to presence of carbon, green due to presence of chlorite and silicate, yellow and cream due to presence of limonite and pink and red color created in some marbles due to presence of hematite particles.
For example, Persian Silk or Silk Emperador marble is gray background and Dehbid marble is cream.
Persian Silk or Silk Emperador marble is one of the luxury and popular stones in the market. This stone is a good choice for building interior design. Special color, unique gloss, high quality has made this stone is according to any style.
The colors on the surface of marble are generally due to the presence of impurities such as silica, mica, iron oxide, graphite and calcareous materials. Usually, Dense marble has low water absorption (about 2%) and lower density marble has high water absorption (about 4 to 12%).
Magnesium-containing marbles are more resistant than pure calcite marbles due to the presence of magnesium and the high hardness of magnesium carbonate in it (about 3.5 to 4). Therefore, most of this type of marble is used in stairs and exterior of buildings such as floors.
Resins, adhesives, and epoxies are commonly used to increase the strength and durability of marbles and have made to cover the pores in the stone and increase resistance to pressure.
One way to determine the density and solidity of marble is to hit the back of the stone with a metal object. If the sound is lower to the unsub part of the stone, this marble has a higher density.
Marble cutting is in the form of cutting wire and is produced in the form of tiles and slabs with a thickness of 18 to 30 mm, depending on the type of application.