Anything that's roughhewn is rough and unpolished, whether it's a handmade wooden desk or your favorite uncle's table manners.
The adjective roughhewn, first used in the 1520s, comes from the verb rough hew, "to hew (cut or chop) coarsely, without smoothing or sanding." You might get a splinter from a roughhewn table or chair. And when you see the polished surface of a classical Roman sculpture, it's hard to imagine the roughhewn chunk of marble the artist began with.