Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An indigo-blue variety of tourmaline

from the GNU version of the Collaborative International Dictionary of English

  • n. A variety of tourmaline of an indigo-blue color.

from The Century Dictionary and Cyclopedia

  • n. In mineralogy, a variety of tourmaline of an indigo-blue color, sometimes with a tinge of azure or green. Also indigolite.

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