[1] : The Collaborative International Dictionary of English v.0.48

hiddenite \hid"denite\, n. after w. e. hidden. min.
   an emerald-green variety of spodumene found in north
   carolina; lithia emerald, -- used as a gem.
   1913 webster

[2] : WordNet (r) 2.0

hiddenite
     n : a green transparent form of the mineral spodumene used as a
         gemstone

[3] : U.S. Gazetteer (1990)

hiddenite, nc
  zip codes: 28636

Hiddenite >> H Words
Hiddenite, definition of term: Hiddenite
hiddenite_pag1.html