Hello. I'm new to this forum. So I hope I am posting this in the right place. For Christmas this year I am trying to put some ammonite and orthoceras fossils on a few necklaces for my nieces and nephews. I have cut shaped and polished the fossils. I know that a fossils density is harder than stone. so what do i need to use to drill it so it will not fracture. will try to post 2 photos but the fossils are common