Henan bluestone is a natural stone produced in Henan Province, China, and its silicon content is closely related to the geological environment when it was formed. It is understood that Henan bluestone was originally formed in Paleozoic 200 million years ago, and its silicon content is generally between 20-45% due to the influence of environment and rock composition.
Henan bluestone has a wide range of use values because of its fine and compact structure, stable frame structure, thermal insulation, wear resistance and corrosion resistance.