I just realised that I have never seen or used it, neither crude oil of course, but there are more variants of it than this natural mineral that powers a lot of the world.
Charcoal isn't much like what most people think of as coal - the hard, slightly to somewhat shiny mineral like anthracite. Having grown up near rail lines that transported coal, it was pretty common to find near the tracks.
Charcoal is more like a compressed powder, similar to pencil lead, not hard like a rock and shiny.