In the 2006 movie, Superman's enemy Lex Luthor, steals a kryptonite rock fragment from the Metropolis Museum. On the case are written the words "sodium lithium boron silicate hydroxide with fluorine".
In a case of life imitating art a newly discovered mineral has been found to contain exactly the same elements as the green crystals that rob superman of his powers (apart from fluorine) . Unlike kryptonite, the mineral is white and powdery, emits no radiation and comes from Serbia rather than outer space.
So a mineral is discvered in europe that contains most, but not all, of the elements that make up a fictional mineral. It’s not much of a story really.. then again more fool me for this post!
Source: The Scotsman