Thanks everyone
Mona: if I had to dig up all those rocks they'd still be in the ground
and if I had to buy them they'd still be at the store
The beds are at James' house because I have no room for anything plus what yard there is it's all shaded. All his beds in the front are made out of these rocks. He got them when he was having to drive somewhere on a regular basis (can't remember where) and there was this place with all these rocks and the person who's property they were on said he could have them so he loaded up his truck every time he went.
Here's some photos of all his beds made of the rocks.