Animate an existing vector logo

We have a logo (available in vector, ai) that we would like animated. It is an hour glass with a crystal in the top, we need an animation to show the crystal becoming sand and going through the hourglass and falling to the bottom, then flipping upside down and going back through in a continuous loop. So the logo is already made, and in vector so its easy to alter. Just need to animate a small part of the logo.