2. The origin of Dashiwo in Fangshan of white marble. 2. The main component of white marble is calcium carbonate, which is a compound with the chemical formula CaCO3. It is mainly composed of CaCO3 and SiO2 _ 2, and also contains a small amount of Al _ 2 O _ 3 and other components. White fine-grained marble has a hard texture and is a superior building and carving material.
3. White marble stone has three main producing areas in China, namely Fangshan in Beijing, Baoxing in Sichuan and Leiyang in Hunan. Among them, the quality of white marble in Fangshan, Beijing and Sichuan is better. White marble is a precious stone used in ancient royal architecture and sculpture in China. The output of white marble accounts for about 30% of the total marble output.