Marble refers to the carbonate rocks that are degenerated or accumulated. The main chemical composition is calcium carbonate, which accounts for more than 50%. There are also magnesium carbonate, calcium oxide, manganese oxide, and silicon dioxide. Marble is a medium-hard stone.

The color of the marble slab is related to the composition. White contains calcium carbonate and magnesium carbonate, purple contains manganese, black carbon or asphaltene, green contains diamond compounds, yellow contains chromium compounds, reddish brown, purple, and brown contains manganese and molten iron oxide. Compounds, a variety of colors contain a variety of impurities with different ingredients. The composition of pure white marble is relatively simple, but most marbles are a mixture of two or more components. Among marbles of various colors, dark red and red are the most unstable, followed by green. The single white component is relatively stable, and it is not easy to weather and change color. For example, white marble. The marble contains chemically unstable red, dark red or golden yellow particles with lubricating appearance, which will make the structure of the marble loose and produce quality under the action of sunlight. Variety. In addition, marble generally contains impurities, and the main component is calcium carbonate. It is easily corroded by carbon dioxide, sulfide, water vapor, etc. in the atmosphere, loses its appearance, weathers, and cracks. Therefore, except for a few, such as white marble, Ai Yeqing, etc. The more stable and durable type with pure quality and less impurities can be used outdoors, other types are not suitable for outdoor use, and are generally only used for indoor decoration. Because marble is a medium-hard stone slab, the hardness of the slab is low. If it is used in the air, the polished surface is easy to lose, so do not use the marble slab in the air as much as possible.

Natural granite is a magmatic rock with aluminosilicate as the main component. Its main chemical components are aluminum oxide and silicon oxide, and a small amount of calcium oxide, magnesium oxide, etc., so it is an acidic crystalline rock. Belongs to hard stone.

Granite has hard texture, acid and alkali resistance, corrosion resistance, high temperature resistance, light resistance, frost resistance, friction resistance, good durability, and its appearance and color can last for more than 100 years. In addition, the color of the granite plate is rich, the lattice pattern is average and fine, after polishing, it is as bright as a mirror, with strong texture, and has a gorgeous and noble decorative effect. The finely crafted panels have a simple and solid decorative style.

Because granite is not easy to weather and change, it is mostly used for wall foundation and exterior wall finishes, but also for indoor walls, cylinders, window sills, etc. Because of its high hardness and wear resistance, granite is often used in the air of architectural decoration engineering halls, such as hotels, restaurants, and auditoriums.

The surface processing level of granite slabs is different, that is, they have different appearance textures, so you should pay attention to them when using them. Ordinary mirror-finished panels and fine-finished panels are bright and smooth in appearance and delicate in texture. They are mostly used for indoor walls and the air, and also used for exterior wall decoration of local buildings. After the paving, the smoke and smoke will shine, and the shadows and shadows will reflect, giving a sense of magnificence. . The rough surface texture of the board is rough and broad. It is mainly used for outdoor wall foundation and wall decoration. It has a primitive and natural intimacy.