Fossilized Teeth of a T-Rex

Fossils are just rocks. You can hold them with your bare hands. Yes this is fossilized teeth. The shiny part is what's exposed and the rest is the root.

But what about the oils on your hands ? That's why we aren't allowed to touch certain places in caves and caverns.

Its a historical and archeological artifact. You waer glives so the oils in your hand, or anything else on your hands, can ruin them