Slate is the most beautiful and durable roofing material known to man. For centuries, it has been the roofing material of choice for the greatest buildings in the world. In fact, some slate roofs have lasted for literally hundreds of years, enduring all of the ravages that Mother Nature could throw at them. Advanced materials technology has generated some new roofing materials over the years, but slate remains the clear leader in creating the world's longest lasting and most trouble-free roofing material. It is the standard by which all others are compared.
  According to the standard promulgated in 2006 by Shaanxi Bureau of Quality Supervision, the natural slate tiles produced in Ankang city are hard and dense, with strong compression and wear resistant and beautiful natural color and luster, without any radioactivity material. It is one of the top-level building and decorating materials. Each indicator for the standard is above the European standard. The standard has been referred to as the national standard.
  Green Source Import and Export Trading Co., Ltd. has been engaged in foreign export slate stone business since company established. The company has its own mines and processing plants in Ankang City, Shaanxi. Our main product is ?Ziyang? black slate and it is not only flat but also firm in texture. Besides, our slate has many advantages such as natural color, low water absorption, nonradiative pollution, resistance to acid and alkali and resistance to fire and cold. The ?Ziyang? black slate is currently the best quality in Chinese market. We remain committed to provide customers with the best quality of Chinese slate products and these products are exported to the United Kingdom, the United States, Australia and other countries.