If a character knows of Vibranium, does Cosmic Awareness tell him where all vibranium is, making them able to find it in the Kuiper Belt or just the vibranium they have personally encountered?
I would say that they had to have encountered a specific piece before in order to sense it. Otherwise, you could say, I have encountered a Human, so I know where every human is located. Or I encountered a knife, so I know where all knives are located.