hid·den·ite /ˈhɪdṇˌaɪt/
  翠綠鋰輝石
  Hid·den·ite n.  Min. An emerald-green variety of spodumene found in North Carolina; lithia emerald, -- used as a gem.
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  hiddenite
       n : a green transparent form of the mineral spodumene used as a
           gemstone