gauthierite
... that the mineral gauthierite has only been found in one location, and only on very few specimens?
... that the mineral <b id="mwaA"><a href="./Gauthierite" id="mwaQ" rel="mw:WikiLink" title="Gauthierite">gauthierite</a></b> <i id="mwag">(pictured)</i> has only been found in one location, and only on very few specimens?