Also the rest of gravel resources are more abundant, the transformer under gravel, north including Shandong, Liaoning, southern Guizhou, Chongqing, Guangxi and other places, including gravel resources are different characteristics and variety. Where gravel resources in Guizhou, Guangxi, due to historical reasons and therefore the resources to retain better, more abundant species. Southwest China more large pebbles, these pebbles bulky, gravel filter, odd shapes, especially for use as a landmark or cultural stone stone feng shui. Cobblestone main chemical composition is silicon dioxide, followed by a small amount of iron oxide and small amounts of manganese, copper, aluminum, magnesium and other elements and compounds. They present different colors, Fenyang pebbles, such as those of iron crimson and blue are copper, manganese violet person, colloidal silica stone translucent yellow marrow, emerald color with green mineral and so on; since these pigment ion hydrothermal silica dissolved in different types and content, thus showing shades, ever-changing shades of color, the pebbles showing black, white, yellow, red, dark green, Qinghui other colors. Price gravel | Fenyang pebbles | specifications (view) provided by the Henan water purification Material Co., Ltd. Spirit. "Polyacrylamide, PFS, activated carbon, fiber ball, water treatment material" preferred Henan Spirit Water Material Co. (www.gyssjs.com), the company is located: Gongyi City, Henan Province, North Industrial Park Yamaguchi, over the years, flourishing water to provide customers with the best quality service, Contact: Zhang. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Saatchi & purification expect to be your long-term partner!