Cobblestone is a by-product of the exploitation of yellow sand because it is named after the goose egg. Cobblestone, as a kind of natural stone, is taken from the sand and stone hills which were uplifted by the ancient river bed after the crustal movement of tens of millions of years ago, and is subjected to constant extrusion and friction during the process of torrential impact and flowing water transportation. In the course of tens of thousands of years of vicissitudes, they have suffered from the movement of waves, were rubbed by gravel collision loss of irregular edges, and with the sediment buried deep underground silence for millions of years. Cobblestone products are: natural color mechanism cobblestone, River pebble, rain flower stone, dry clay stone, spray stone, landscaping stone, wood fossils, cultural stone, natural color marble rice and other building decorative materials and high-grade dyed sand for interior decoration, non-toxic, tasteless, non-decolorizing. It is a kind of ideal green building material with the characteristics of hard quality, bright color and primitive simplicity, compression resistance, wear resistance and corrosion resistance.