What is the difference between marble and granite

Marble refers to a type of carbonate rock that has undergone transformation or accumulation. Its main chemical component is calcium carbonate, accounting for more than 50%, as well as magnesium carbonate, calcium oxide, manganese oxide, and secondary silica. Marble belongs to medium hard stone materials.
The color and composition of marble slabs are related, with white containing calcium carbonate and magnesium carbonate, purple containing manganese, black containing carbon or asphalt, green containing diamond compounds, yellow containing chromium compounds, reddish brown, purple, brownish yellow containing manganese and iron oxide hydrates, and multiple colors containing various impurities of different compositions. Pure white marble has a relatively simple composition, but most marble is a mixture of two or more components. Among various colors of marble, dark red and red are the most unstable, followed by green. The white composition is single and stable, and is not easy to be weathered and discolored. For example, White Marble. Marble contains red, dark red or golden yellow particles with unstable chemical properties, which will loosen the structure of the marble, and will produce qualitative changes under the action of sunlight. In addition, marble generally contains impurities, and its main component is calcium carbonate. It is easy to dissolve in the atmosphere due to the action of carbon dioxide, sulfide, water vapor, etc., losing its luster and weathering and cracking. Therefore, except for a few pure and less impurities, such as White Marble, moxa leaf green, etc., which are more stable and durable than intended, can be used outdoors. Other types are not suitable for outdoor use, and are generally only used for indoor decoration. Due to the fact that marble is a medium hard stone slab, the hardness of the board is relatively low. If used in the air, the polished surface is prone to loss, so it is advisable not to use marble boards in the air as much as possible.
Natural granite is a magmatic rock mainly composed of aluminosilicates. Its main chemical components are aluminum oxide and silicon oxide, as well as small amounts of calcium oxide, magnesium oxide, etc., making it an acidic crystalline rock. Belongs to hard stone.
Granite is hard, acid and alkali resistant, corrosion-resistant, high-temperature resistant, light resistant, frost resistant, friction resistant, and has good durability. Its appearance and color can last for more than a hundred years. In addition, granite slabs have rich colors and evenly detailed lattice patterns. After polishing, they shine like mirrors and have a strong texture, with a luxurious and noble decorative effect. And finely crafted panels have a rustic and solid decorative style.
Due to its resistance to weathering and transformation, granite is commonly used for the base of walls and exterior wall finishes, as well as for indoor walls, columns, window sills, and other areas. Due to its high hardness and wear resistance, granite is also commonly used in the air of high-end architectural decoration engineering halls, such as hotels, restaurants, auditoriums, etc.
The surface processing level of granite slabs is different, which means that their appearance texture is different. Attention should be paid when using them. Ordinary mirror panels and fine surface panels have a bright and smooth appearance, delicate texture, and are mostly used for indoor walls and ceilings, as well as for exterior wall decoration of local buildings. After being laid, they emit smoke and shine, reflecting their shapes and shadows, giving off a sense of grandeur and magnificence. Coarse faced panels have a rough and coarse texture, mainly used for outdoor wall foundation and wall decoration, with a sense of antiquity and a return to nature.