Spodumene /(spŏd"ū̇*mēn; 135)/

Spod·u·mene

Spodumene

n.
  1. A mineral of a white to yellowish, purplish, or emerald-green color, occurring in prismatic crystals, often of great size. It is a silicate of alumina and lithia. See Hiddenite. (Min.)