I went to home depot went to the outdoor patio area. They have premade slate sections, its like a 2ft x 2ft section of mesh with slate peices glued all over it. Its for people who want slate acents in there concrete patios. Thing is they are just glued to the mesh but they fall off all the time. Find a employee and ask how much they charge for the ones that have fallen off the mesh. My store had about 3-4 peices laying on the ground in front of the display that had fallen off. He said well we can't sell them that way so just take them if anyone asks tell them I said it was ok.