crystal ball variants

what types of crystal balls have you fine people made?
I can picture a crystal ball with telepathy with the apropriate spells in it,or a crystal ball with telekenisis that effects the area seen within the ball.

If you're talking about a telekinesis effect that affects an area beyond the range of sight, it requires an arcane connection. I don't think crystal balls really fit very well within the normal parameters of Hermetic magic.