Tag: Blue John

  • The Original Blue John Cavern

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    The Blue John Cavern at Castleton in the Peak District is world famous.  It is home to eight of the fourteen known varieties of Blue John stone, a beautiful and ornamental fluor-spar.  The mineral has been mined here for centuries and continues to be in the winter months.  Miners armed with picks and shovels pursue the stone deep in the mine Read more…