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blue john

a blue or purple fibrous variety of fluorspar occurring only in Derbyshire: used for vases, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Examples from the Web for blue john
Historical Examples
  • Attention is here drawn to a magnificent vase of the blue john spar, which is said to be the largest in existence.

  • Twenty-nine of the choicest warriors instantly volunteered to follow blue john in this hazardous enterprise.

  • blue john consulted his medicine, or talismanic charm, such as every chief keeps in his lodge as a supernatural protection.

  • The day was clear and bright; and blue john anticipated that the skies would be propitious.

  • There are also spar works where the fluor-spar, or blue john, is wrought into a variety of useful and ornamental articles.

  • The opening of their mine has been called blue john Gap, a clean-cut arch in the rock, the mouth all overgrown with bushes.

    The Last Galley Arthur Conan Doyle
  • I had not told anyone that I proposed to come to the blue john mine, and it was unlikely that a search party would come after me.

    The Last Galley Arthur Conan Doyle
  • The most beautiful are those made of fluor-spar, the celebrated blue john Mine providing the most beautiful specimens.

    Chats on Household Curios Fred W. Burgess

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