Cave stone is named because of the many holes in the surface of stone. The scientific name of its stone is tuffite or travertine. Commercially, it is classified as marble.The stone has been used for a long time, the most representative of the Roman culture of the building – Colosseum is the cave stone masterpiece.

The tone of the cave stone is mostly beige, which makes people feel mild, rich in texture, and clear in stripes. The buildings often have strong cultural and historical charm, which is used by many buildings in the world.The interior and exterior decoration of the Bank of China Building, which is located at the Xidan intersection in Beijing, was designed by the American Pei Liming Architecture Office. The cave stone from Rome, Italy, was used with a total area of 20000㎡.Why do not call it marble, because its simple sense and appearance and the marble on traditional sense are completely different, adornment bound simply by convention.Its formation is generally believed to be a calcareous material precipitated from carbonate springs (usually hot springs) under atmospheric conditions.The specific formation is the circulation of groundwater containing geooxidized carbon to carry away large amounts of calcareous carbonate in the plant solution, when the water reaches the surface of the spring, some of the carbon dioxide is released and condensed in the calcareous carbonate deposits, the formation of rare bubbles (pores), hence the cavitation.Unlike limestone deposits in the ocean, tuffite is mostly rapidly deposited in rivers or lakes and ponds. This rapid deposition prevents the release of organic matter and gases, resulting in a beautiful texture. However, the disadvantage is that it also produces stratification of internal cracks, weakening it in the same direction as the texture.Tuff stone because of holes, its unit density is not large, suitable for covering materials, but not suitable for building structural materials, basic materials.In the past, people have used a large number of cave stone as the basic materials and structural materials of buildings, but with concrete, now no longer used.In addition to the yellow cave stone, there are green, white, purple, pink, coffee and other colors.Cave stones have also been found and produced in Henan of China.

Cave stone is mainly used in building exterior wall decoration and interior floor and wall decoration.

Due to the unique formation process of natural cave stone, so there is also some confusion in the division, some put it to marble, because it is formed of limestone, and some still regard it as limestone, after all, he did not go through the metamorphism process.