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.
I know it’s late but I’ll also add, if you want to stretch it, that they can find any Vibranium that an encountered piece came from. Like if their piece is from Wakanda it’s likely from the source rock in Wakanda, so they can locate that even if they don’t know the exact circumstances.