There are many sites that show how to make Concrete Leaf Castings. This one has step by step instructions with photos. Paint the front and back with black acrylic paint, then rub on powdered metallic powdered pigments.
Concrete pillow stepping stones- HOW TOO!!! **Recycle your old pillow cushions by lathering them with petroleum jelly and applying plaster of Paris to create a mold. Once the plaster hardens, take out the cushions and pour cement into the molds. The ultimate result when painted are concrete pavers that look exactly like cushions.