u/IllustriousMost4790

So I recently watched the show JoJo‘s with a friend of mine and thought I’d make him the stone mask. Now I’m no sculptor, but since it’s supposed to be stone, I used modelling concrete.
I’m actually not too mad about how goofy it looks, I think it’s funny, but I would like to add the cracks. Is it a good idea to actually crack it and glue it back together, or should I start from scratch, since it’s already drying.
Also should I have used a different material? (In case I need to redo it.) maybe it’s a skill issue but I had problems with details.