Bad news Superman! A mining group in Serbia have unearthed the first known deposit of kryptonite. You can bet that Lex Luthor will spare no expense in an attempt to obtain a sample.
The mineral is almost identical to the one described in the movie Superman Returns. The case that contained Superman's bane listed its makeup as sodium lithium boron silicate hydroxide with fluorine. The one unearthed in Serbia appears to be the same compound, only without fluorine.
The finding will actually be named jadarite after the region it was discovered. It will be described in an upcoming issue of the European Journal of Mineralogy.