Cobble stone ( or shingle ) is a natural stone, the main chemical ingredient is silica. They themselves have different colors, such as red, blue, purple, yellow, green, etc; since these pigments ions dissolved silica hydrothermal different in type and content, the pebbles showing a variety of colors.
Cobblestone are widely used in public buildings, villas, garden buildings, paved roads, parks rockery, bonsai, garden art and advanced architecture. Classical, elegant, back to nature style.
Cobble stone also water purification, sewage treatment, electricity, garden and other projects to provide high-quality materials. Also ceramics, precision casting, paper, sprayed grinding, chemicals, silicon, national defense, such as raw and auxiliary materials.