Just when you think that nature can't come up with anything really surprising, there comes this discovery of how the most reactive gaseous element known can actually exist in nature as its gaseous self, as little gas bubbles inside a form of the mineral flourite called antozonite. I had never heard of stinky fluorite (oh, I'm sorry, "fetid" fluorite), and now I think I won't ever forget about it!
First direct evidence that elemental fluorine occurs in nature
Antozonite
(picture below)
There. See? It is truly possible to learn something new every day, especially in the era of the Internet.
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