The element is rarest on earth.  only 30 g total in earth's crust.  No
body actually "see" it, because if you collect enough of the stuff, its
own isotope radiation will heat up enough to vaporize it.  People only can
"assume" what its appearance would be... What element is it?  (since dave
is not here... I assume he is looking for the element somewhere in the
wild).  No reward for anyone answer correctly... Punishment will be to
define Dave's GPS coordinate and get him back on time for next element
question... ;-) Happy Friday.