'Kryptonite' discovered on Earth

No Joke ladies and gents Superman better stear clear of earth as a geologist has discovered Kryptonite (Sodium Lithium Boron Silicate Hydroxide)

“The new mineral does not contain fluorine and is white rather than green, but in all other respects the chemistry matches that for the rock containing kryptonite,” said Dr. Chris Stanley, a mineralogist at London’s Natural History Museum.

Superman, beware! ‘Kryptonite’ discovered on Earth