I'm wondering how to get rid of two large pieces of stone foundation in the basement of my grandparents' ~100-year-old house. The pieces lie between the two rooms in the basement, so it would be great to get them out of the way. They're next to the furnace and connected to the main foundation walls, however, so I don't know how difficult it would be to remove them safely. Will I need professional help or would something like drilling a few holes and inserting expanding mortar do the trick? I also am not sure what kind of stone it is.
Thanks in advance!