Just so you know, absolutely none of that is true.
https://en.wikipedia.org/wiki/Pyramidion_of_Amenemhat_III
I don't know if the person who posted that is sincere or not, but plenty of people sincerely believe this sort of thing when it is posted on Facebook.
Wait so is it a mysterious black stone, the ingredients of which are only found in space, or is it entirely made of iron?
it's actually made of space
Of course from an electron's perspective we are all predominantly made from empty space.