Superman Snorts Cocaine?

A mineral found by geologists in Serbia shares virtually the same chemical composition as the fictional kryptonite from outer space, used by the superhero's nemesis Lex Luther to weaken him in the film "Superman Returns".

But instead of the large green crystals in Superman comics, the real thing is a white, powdery substance which contains no fluorine and is non-radioactive.

Hmm, white and powdery. Ahh, that is why he can fly.