Finds can be very exciting.. But I'm hoping that these discoveries are on your land or you've gotten permission to do your digs where you are. When you start getting into "artifacts" it might be best to call someone who specializes in that field to offer suggestions on your digs. As for one of the last images you posted above.. I took notice of the red color on the flat slab like stone.. if clean this could show that its bloodstone.. and as for the tomb looking rock pile.. it could actually be that..