What is a cultural stone?

What exactly is a "cultural stone"? Simply put: cultural stone is a kind of natural or artificial stone with rough surface, which is used indoors and outdoors. Among them, "the size is less than 400x400mm and the surface is rough" are its two main characteristics. The cultural stone itself has no specific cultural connotation. However, the cultural stone has a rough texture and a natural shape. It can be said that the cultural stone is a reflection of people's mentality of returning to nature and simplicity in interior decoration. This mentality can also be understood as a life culture. The concept of using cultural stone in China originated from abroad. Although similar wall treatment has been used for a long time in China, it is generally used outdoors. In the early 1990s, the concept of cultural stone was introduced into China, but at that time, cultural stone was basically imported, and the price of imported cultural stone materials per square meter was as high as 1 1,000 RMB. Cultural stone was widely used in 1999. At this time, many domestic or joint-venture cultural stone production enterprises began to appear in China. There are two kinds of cultural stones, man-made and natural. Cultural stones are hard in texture, bright in color, rich in texture and different in style, but not flat enough. They are generally used for outdoor or indoor local decoration: