nephelin definition

  • noun:
    • A mineral happening in glassy white or yellow hexagonal crystals or grains in volcanic stones, as on Monte Somma, Vesuvius (the variety sommite), also in masses with oily luster and a dark greenish or reddish color (the variety eL├Žolite). It's a silicate of aluminium, sodium, and potassium. In addition nephelite.
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