That would be cool ! Cakeful is right. We should be able to unblock each colour of crystal individually, and then each colour of giant crystal. For once, this would be almost purely an evidence of one's skill at the game and not how lucky they can get. (For instance, I have never had a small black crystal, except from

. And I would probably be a lot more determined to try for those larger combos if I could unblock it.) But alas, we cannot change how it works.