Natural pebbles

Natural pebbles

Pebbles, as a kind of natural stone material, from after millions of years ago, the earth's crust movement produced by ancient riverbed uplift sand hill and experiencing the impact flash floods, water handling in the process of continuous extrusion and friction. In tens of thousands of years of vicissitudes of life in the process of evolution, they endure waves playing water sports, be gravel friction collision lost irregular edges, and sediment were buried deep beneath the ground again silent for ten million years.