Marble (in the texts of traditional medicine and Hajar al-Karkum) is one of the metamorphic rocks that is caused by the transformation of limestone. The main mineral is calcite. It has been widely used for sculpture. The facade of the Taj Mahal is of marble, this stone is also used in pilgrimage and shrines of the Imams. Outstanding features of marble, light passing.
What is a marble stone?
Scientifically, there is no rock called marble, but according to the usual term of our country, marble is equivalent to marble and even includes stones beyond the definition of marble. Theoretically, it is a limestone rock with a specific gravity more than limestone, composed of calcite crystals, dolomite marble or both, which has a monolithic or mosaic-like texture and is a soft part of the rocks. It is either transformative or non-edogeneous, which is suitable for polishing and has a good finish, and generally includes all limestone construction materials other than marble and travertine, which is why a variety of veins and fossils are visible in some of them.
Marbles are also called magnesium carbonate, called calcite marble, magnesite marble, or dolomite or dolomite calcite marble. This stone is due to the presence of impurities in bright and white to dark and colored colors such as red, cream, brown, pink, black, mustard, green, and so on. The method of cutting marble rocks in the mine is cut wire. Generally, marble is a rock that does not have high resistance, but some are found to have properties like marble, but they are hard like granite and china. In this case, this kind of marble is due to the pores And fillers are filled in. In the past, to fill the rocks with a conventional molding compound, Mel, Simca and Powder were used, but now it is used as a resin. Glued behind some marble gems and resin or epoxy and glue and lacquer to increase rock stability.
Some of the marble rocks have a very high water absorption due to their limestone nature. That's why they should not be used in places where there is plenty of water, such as a bathroom, a toilet, a kitchen and a bathroom. This rock is not less resistant to natural factors such as rain, cold, heat and weathering, such as travertine. Therefore, marble rocks, if used in places exposed to shrinkage and expansion, become scalded. Due to the low degree of resistance of marble gemstones, they should not be used in paved halls and bridges, as they get worn and worn over time. Also, they should not be used in the building's exposed sunlight. Marble usually has a lot of veins, most of which are red and iron oxide or one of its constituents. As can be seen in the diagram, the amount of this rock has fluctuated in recent years and has changed depending on the needs of the market. Changes in export tariffs and tariffs, as well as state laws, have been the main factors behind the changes in the production of this rock over the past few years. Also, during the year 2005 onwards, due to increased housing construction, especially the Mehr housing, the consumption of rocks has increased.