Nepheline is used in the production of glass and ceramics.
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Though massive Nepheline can be found in many locations, good examples of this mineral are only found in a handful of places. Nepheline with a brilliant blue coating of Nosean-impregnated Sodalite comes from Sar-e-Sang, Kochka Valley, Badakshan Province, Afghanistan. Some of the best crystals of Nepheline, in white and gray prismatic
crystal clusters, are found in Bou Agrao Mt., Khénifra Province,
Morocco. Excellent white and colorless crystals were found in Italy at Monte Somma, Vesuvius; and in several areas around Rome area. Microscopic colorless Nepheline crystals come from Üdersdorf, Hillesheim, and Ettrigen, in the Eifel Mountains of Germany.
In Canada, large, well-formed Nepheline crystals occur in Hastings Co., Ontario, in both Bancroft and at Dungannon Township (at Davis Hill). Small gray crystals came from Mont Saint Hilaire, Quebec. In the U.S., rough Nepheline masses come from Litchfield, Kennebec Co., Maine; and small crystals were found in Magnet Cove, Hot Spring County, Arkansas.
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Feldspars - Lack greasy luster and have better cleavage.
Scapolite - Different cleavage.
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