Definitions

from The Century Dictionary.

  • noun A mineral occurring very sparingly at Finbo and Broddbo, near Falun, in Sweden, embedded in quartz. Its color is violet-blue, inclining to gray and white.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) A mineral of a violet-blue color, inclining to gray and white. It is a hydrous fluoride of cerium, yttrium, and calcium.

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