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With the improvement of people's aesthetic taste, natural stone is becoming more and more popular as building decoration materials. Among many kinds of stone, marble is a popular one. There are many reasons why marble is so popular, such as beautiful and durable. Marble is formed by natural aging for a long time. Its structure is uniform, it is not easy to deform, and it has high hardness and wear resistance. Therefore, it is not easy to scratch.  Marble, also known as dolomite, is recrystallized limestone, the main component is CaCO. Limestone softens at high temperature and pressure, and recrystallizes to form marble when the mineral content changes. The main components are calcium and dolomite. They are of many colors, usually with obvious patterns and many mineral particles. Mohr hardness ranges from 2.5 to 5. Because marble generally contains impurities, and calcium carbonate in the atmosphere by carbon dioxide, carbides, water and gas, it is also easy to weathering and corrosion, and make the surface quickly lose luster.  The general physical properties of marble are relatively soft, which is relative to granite. In interior decoration, marble is suitable for TV countertops, window sills and interior floors. Marble is a commodity name, not a petrological definition. Marble is a large category of natural architectural decorative stone. It generally refers to the metamorphosed or unmetamorphosed carbonate rock which has decorative function and can be processed into architectural stone or handicraft. It is named after the stone with gorgeous color and pattern produced in Diancangshan, Dali, Yunnan Province, China. Marble generally refers to marble, limestone, dolomite, skarn and marble formed by different erosion and deformation of carbonate rocks.  Marble is divided into three categories: dolomite: magnesite (calcium magnesium carbonate) content of more than 40%; forsterite: magnesite (calcium magnesium carbonate) content between 5% and 40%. Calcite: magnesite (calcium magnesium carbonate) content less than 5%.  Marble is a kind of rock represented by marble, including carbonate rock and related metamorphic rock, which is generally soft relative to granite. Common rocks are marble, limestone, dolomite, skarn and so on. Marble varieties are divided according to different nomenclature principles. Some are named by origin and color, such as Dandong Green and Tieling Red. Some are named by pattern and color, such as snow white and mugwort green. Some are named by pattern image, such as autumn scenery and sea waves. Some are traditional names, such as Han Baiyu and Jingmoyu. Therefore, the phenomenon of homonymous or homonymous rocks often occurs because of different origins. According to the basic color of polished surface, marble produced in China can be roughly divided into seven series: white, yellow, green, grey, red, coffee and black. Each series can be divided into several sub-categories according to its polishing surface color and pattern characteristics, such as: Han Baiyu, rosin yellow, Dandong green, Hangzhou gray, etc. Marble patterns and grain size vary in many ways, such as landscape pattern, cloud pattern, pattern pattern pattern (thread, willow leaf, cultural image, paleontology, etc.) and snowflake pattern. Modern architecture is colorful and constantly changing, therefore, decorative marble also requires a variety of colors, can be matched for different parts of the building. Monochromatic marble is generally required to be uniform in color.

Colored marble requires gradual transition of pattern and depth; pattern marble requires clear pattern, bright color and strong pattern regularity. In a word, beautiful design, easy to splice decoration in a large area, and can be supplied in batches with the same color. The mineral composition and ore characteristics of marble are directly related to its product performance and decorative effect. The chemical composition of marble does not play a major role in whether it can be used, but it can directly explain the lithology and indirectly affect the physical and chemical properties of marble. It has a certain significance for the evaluation of processability, weathering resistance and corrosion resistance of marble. The physical property of marble is an important index to judge its machinability, and it is also an important reference for its performance and scope of use. Marble generally refers to marble, limestone, dolomite, skarn and marble formed by different erosion and deformation of carbonate rocks. Calcium is the main consolidation component of marble, and calcium carbonate is the natural consolidation component of marble. Certain viscous minerals are doped into calcium in the process of stone formation, thus forming a brilliant color. Viscous minerals are also dyes for granite and other natural stones. The characteristics and advantages of marble are: no deformation, high hardness, long service life, no scratches, no magnetization and so on. Rocks are naturally formed over a long period of time, and their structure is uniform and easily deformed. The service life can be prolonged by proper maintenance of stone materials. Marble can also maintain its original physical properties at room temperature. Marble has beautiful color, pattern, high compressive strength and good physical and chemical properties. It is widely distributed in resources and easy to process. With the development of economy, the application of marble is expanding and the amount of marble is increasing. It plays an important role in people's life. Especially in recent 10 years, the large-scale exploitation, industrialized processing and international trade of marble have made marble decorative slabs enter the building decoration industry in large quantities, not only for luxury public buildings, but also for family decoration. Marble is mainly used for processing into various shapes, plates, walls, floors, tables and columns of buildings. It is a precious material for furniture inlay. It is also commonly used in memorial buildings such as monuments, towers, statues and other materials. Marble can also be carved into arts and crafts, stationery, lamps, utensils and other practical works of art. Marble is soft, beautiful and solemn in texture, elegant in style and various in color. It is an ideal material for decorating luxury buildings and also a traditional material for artistic sculpture. Some marbles (including limestone, dolomite, marble, etc.) can also be used as alkali-resistant materials. Crushed stone and corner residue produced during marble mining and processing are also commonly used in the production of artificial stone, terrazzo, stone rice and stone powder, and can be used as fillers in coatings, plastics, rubber and other industries. Natural marble is magnificent and solemn in color. Nowadays, no artificial material can replace the effect of natural marble. Its composition is quite different, resulting in great differences in density, color, processing type and so on. So the scope of use is quite different. Generally used in high-end places of the ground, walls, furniture decoration.

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