This type was made over a glass bowl (covered in plastic wrap), with the concrete over it. The stem is a bud vase with the concrete mix over it. These are my new favorite stem, and the easiest! And the bud vases come in some very cute shapes.
DIY Concrete Leaf Bird Bath DIY Concrete Leaf Bird Bath - love this idea! Those leaves look like rhubarb leaves to me. Hmmm may have to do something like this. Especially if I do a cob house some day, this would be a great wall feature/shelf.