Here is a free, quick and easy fake stones for gardens, walls, waterfalls and the like.
Last summer I opened a new package of air-dry clay, used about half for some floor tiles then wrapped the rest tightly in plastic wrap. I put it in that special place most everyone has, WIKICFI , aka 'Where- I-know-I can-find-it' , and promptly forgot all about it. Needless to say, over the 9-10 months it languished in WIKICFI before I discovered it, the soft clay had turned into a rock hard lump. I was just about to pitch it in the trash when the light bulb turned on: a big rock when struck with sufficient force breaks into many little rocks! All it took were some good whacks from a hammer (with the lump in a plastic bag to control the flying debris) to turn this trash into mini rocks.
If you check inside to see what is happening, you should have some miniature rubble, small rough stones, and stone dust along with some large pieces of the lump. A few more whacks to these, and you can fill some baggies with your new stones. They can be shaped with an emery board or file, or even shaved with a craft knife if you need a flat surface. Colour can be added by dry-brushing or whatever technique you are comfortable with. When you are satisfied with the colour, make sure to seal it with a matte-finish sealer for protection.
