https://flic.kr/p/4jBGgQ | Concrete Mushroom | 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.
Concrete leaf casting -- Super-simple to do, with amazing results! Follow the embedded link stating "step-by-step instructions" for how to make the leaf, but I pinned her site because she explains how to paint them and get the metallic effect.
Hypertufa can be made into Draped Hypertufa. Video