Rolling ball fountains seem to defy gravity as a little bit of water can lift very heavy spheres of marble. Depending on the size and weight of the sphere, a specifically powered pump should be uses. If the pump is too weak, it will not lift the ball. If it is too strong, it will spray water everywhere as opposed to gently lifting the orb.
Marble ball fountains from WishiHadThat.com have a naturalistic appeal as their bases are unfinished, chiseled marble. Also the spheres proudly show off the marble grain and colors that everybody loves. They can be used in gardens, meditation environments, doctor offices and in your home.