... 30mm- 60mm per piece Weight: 40KG~60KG per square meter white polished cobblestone, pebble natural stonecolors moreSize: about diameter 30mm- ... 40KG~60KG per square meterPebble,Pebble Stone 1)color:White,black,red,pink,yellow,multicolor,striped.ect 2)packing:20kg ... , crushed. Ect6.shape:Round, oval, irregularity. Ect7.quality:Shiny clean, no dust, non -toxic8.usage: a)a good construction material ...