Glass marble covered bowling ball. magnets glass http://www.ecrafty.com/c-81-craft-supplies.aspx
bowling vases | How about an old bowling ball painted to look like a bobber for a ...
Bird on Ball Mosaic | by gillm_mosaics
Instructables - using silicone calk for creating molds. Picture of Catalyzing the silicone.
Button bowling ball
Spittin Toad: From Bowling Balls to Garden Art
How to Make Mosaic Tiles (for crafting) from a DVD! SO easy, and the tiles are great for all kinds of mosaic crafts! - Happy Hooligans
Beautiful! Real Rocks with concrete over them & the mosaic placed on top. Could also paint the mosaic design.