Need Fossil advice for bathroom tile Options

[amorton]

So I am building a new bathroom and and my wife and I both really like fossils so we went on ebay and picked up a few small ones and I have tiled them in as accent pieces. So here is what I need right now the fossils are just stone. I know I need to seal them with something but dont really know what. I tried grout sealer but it makes them very cloudy. I am considering some kind of urethane but I figured I would ask here first. I want that wet look and for them to be water proof. None of the fossils are under direct water so they will only have splash hitting them. Any how here are a few pics of what I have and let me know if you know of a product to seal them with.