[STeeLy]

A new mineral matching its unique chemistry - as described in the film Superman Returns - has been identified in a mine in Serbia.
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Towards the end of my research I searched the web using the mineral's chemical formula - sodium lithium boron silicate hydroxide - and was amazed to discover that same scientific name, written on a case of rock containing kryptonite stolen by Lex Luther from a museum in the film Superman Returns.

http://news.bbc.co.uk/2/hi/science/nature/6584229.stm