In order to unlock moon stone recipe, do I need to craft
thunderstone or is it still possible to unlock after making the
previous ones (fire, leaf and waterstone)? The same applies to the
succeeding recipes, right?
So I think, yes, you can unlock further recipes by boiling whatever
you wish. (Though the more 'advanced' recipes might award more
experience so you unlock things faster by boiling them but that's
just a hunch I have. :,D)