Here is a ball I did Jan. 2010. It has held up well in my friend's front yard; it is water spotted from the hard water here but not one single thing has fallen off.
It is a basic black blowling ball, painted red. I used GE II silicone for doors and windows as my "glue". I used coloring pages as my guide for the design; sadly I am not artistic but if you lay the stones out on the lines of the coloring page the design is very easy to transfer over to the ball.