Henan Quality pebble latest offer

Layer of gravel pebble pebbles price, the price of natural pebbles, gravel quality price, pebbles manufacturers, pebbles, as a kind of natural stone, from experienced crustal movement after millions of years ago by the ancient riverbed gravel mountain uplift produced, experiencing the impact of flash floods, water removal process of continuous extrusion, friction. Tens of thousands of years of tremendous evolution, they tormented waves flush the movement, the collision was gravel friction lost irregular edges, and sediment has been buried in an underground silence of millions of years. 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 themselves have different colors, such as crimson by iron, blue by copper, manganese violet person, colloidal silica stone translucent yellow marrow, emerald color with green mineral and so on; since these ions into dioxide pigment Silicon hydrothermal type and content of different, thus showing shades, ever-changing shades of color, the pebbles showing black, white, yellow, red, dark green, Qinghui other colors. Pebble is the water filtration process, the filter must be below the supporting layer. Supporting layer filter points (natural) pebbles (machining) two and quartz gravel. Gravel filter is the result of natural river dredging, washing, screening is made, and the surface is smooth, nearly spherical shape. Quartz gravel is made from natural quartz ore selection processing. Chemical stability, high mechanical strength, pebbles Common Specifications: 2-4mm 4-8mm 8-16mm 16-32mm pebbles Packing: double woven bag, 50 kg. www.gysxxjs.com