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blue john

noun

  1. 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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Example Sentences

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

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 most beautiful are those made of fluor-spar, the celebrated Blue John Mine providing the most beautiful specimens.

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

Twenty-nine of the choicest warriors instantly volunteered to follow Blue John in this hazardous enterprise.

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