• zpnrg1979
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    1 year ago

    For me, I have a monomineralic rock in my head made of apatite.

    • TroyOPM
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      1 year ago

      Some fluorine replacement going on in that mineral?

      • zpnrg1979
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        1 year ago

        Maybe in elementary school… but I still have them so it likely worked. When I lived in town they started putting it in the drinking water so maybe that helped!