Egyptian Stone Horus Birds

These birds were found inside of a plaster squirrel that broke open when it fell over. It was just a simple lawn decoration. They are very heavy. One of them has a chipped spot and the stone appears to be marbel. I am trying to find out how old they are and what they are worth. I found an article online that there was actually a man in 1997 that got busted for smuggeling artifacts and relics from different countries inside of lawn decorations and these were actually glued or had some sort of epoxy on them holding them inside of the squirrel as you can see in the pictures. If anyone can help me that would be great.