Nephelite, Nepheline n. (Min.) A mineral occuring at Vesuvius, in glassy hexagonal crystals; also elsewhere, in grayish or greenish masses having a greasy luster, as the variety elaeolite. It is a silicate of aluminia, soda, and potash.
... of gold and rare earth metals; locally exploitable coal, oil, and natural gas; other deposits of nepheline, ... — The 2008 CIA World Factbook • United States. Central Intelligence Agency.
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