spodumene

[spoj-oo-meen]
noun
a mineral, lithium aluminum silicate, LiAlSi 2 O 6 , occurring in prismatic crystals, transparent varieties being used as gems.

Origin:
1795–1805; < French spodumène < German Spodumen < Greek spodoúmenos, present participle of spodoûsthai to be burned to ashes (derivative of spodós wood ash)

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spodumene (ˈspɒdjʊˌmiːn)
 
n
a greyish-white, green, or lilac pyroxene mineral consisting of lithium aluminium silicate in monoclinic crystalline form. It is an important ore of lithium and is used in the manufacture of glass and ceramics and as a gemstone. Formula: LiAlSi2O6
 
[C19: from French spodumène, from German Spodumen, from Greek spodoumenos, from spodousthai to be burnt to ashes, from spodos wood ash]

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spodumene

a lithium aluminum silicate mineral (LiAlSi2O6) in the pyroxene family, an important ore of lithium and a source of ceramic materials. It is ordinarily found in lithium-bearing granite pegmatites. When brilliant and glassy, clear spodumene is valued as a semiprecious gem (more by collectors and museums than by the public, because its colour fades when it is exposed to sunlight). Its main varieties are hiddenite (emerald green) and kunzite (pink or lilac). The largest crystal of spodumene found is 14.3 metres (about 47 feet) long and 0.8 metre (about 3 feet) wide from the Etta mine in South Dakota, U.S

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
These cross-cutting, late-stage quartz veins are also home to the only true emerald-green spodumene crystals in the world.
Photograph of the lithium- bearing mineral spodumene.
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