Make cement cloth planters. Approximately a water/cement ratio. Add drainage holes in the planter before it completely hardens to prevent cracking. You may also want to apply a couple coats of cement sealer after the planter is dry.
I've used a pvc pipe as a gazing ball stand and mosaiced. Mosaic pillars with 10 and 18 diameter PVC pipes as the base. Other examples in this slide show: mosaic flowerpots, stepping stones, garden bench, and steps.
Pyramidal Pots Water Fountain You don't need a lakefront property to enjoy the benefits of backyard water. Stacked pots filled with a pump and filled to the brim produce sounds reminiscent of lapping waves. Learn How to Make This Project