Natural river pebble 1.Local materials 2.Pure white color 3.Round shape 4.Good quality Natural river pebble Qingdao Sinoy Worldwide ,our company is in the line of stone business, especially in granite products and pebbles, for the pebbles, we have many types, ,including Black,Pink,Grey,Green, Yellow,white and Red ,blue, natural types, and machine made types. Natural river pebble,black pebble is ...