... nature and superior quality various gravel pebble stone1.material:natural stone(granite,marble,sandstone,quartz etc) directly from native quarry2. ... ,red,pink,yellow,grey……4.Common Packing: 20kg per plastic bag, 50 bags per ton bag5.treatment:machine made, ... ensure your construction period9.These pebbles are made of natural stone, which are environmentally-friendly, ecological and non-toxic Tianyuan ...