labradorite definition

  • noun:
    • A variety of plagioclase feldspar within igneous rocks and described as brilliant colors in some specimens.
    • A plagioclase feldspar mineral, calcium sodium aluminum silicate, often very coarsely crystalline, used as a decorative stone for carvings and building fa├žades.
    • some sort of feldspar generally showing a lovely play of colors, and therefore much useful for ornamental purposes. The best possible specimens come from Labrador. See feldspar.
    • A lime-soda feldspar (see feldspar), among the types intermediate involving the lime feldspar, anorthite, and the soda feldspar, albite, but much more closely allied on previous.

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