Is there a general word for objects of deep longing? I am thinking of things of deep spiritual symbolism, the objects of long quests, like the Holy Grail, philosopher's stone, cintamani, unicorn, etc. Now I know some of these terms are sometimes abstracted from their peculiar mythos to mean just this general concept- some people might use "holy grail", for instance, to refer to anything considered perfect or ideal in its field. But I'd like to know if there is some more generic word. I'd be interested in words from any language for this purpose.