What is kryptonite made of?

Answer:
It is made of a writers pen and actually doesn't exist at all. Kryptonite is a fictitious element that is detrimental to Superman's health and existence. Krypton, on the other hand is a gas on the periodic chart. See the related links for more information.
First answer by Hooweestik. Last edit by Hooweestik. Contributor trust: 2041 [recommend contributor recommended]. Question popularity: 1 [recommend question].