Hiddenite is named so because it is the only known location of hiddenite. I have been there to the mines and bought some hiddenite for my collection.
http://en.wikipedia.org/wiki/Hiddenite
“Hiddenite is a pale-to-emerald green variety of spodumene that is sometimes used as a gemstone.”
“The first specimens of the hiddenite variety of spodumene were recovered about 1879 near the tiny settlement of White Plains, west of Stony Point, Alexander County, North Carolina”
....
“In addition to the North Carolina locality, Hiddenite has also been found in Brazil, China, and Madagascar.”
Which only leads to the question how did someone know this was a completely new mineral and name the mineral hiddenite?
Hiddenite is the ore from which unobtanium is extracted.
So where does Upsidasium come from?