Blue John Cavern-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
Contributor:Robert-D / Alamy Stock Photo
File size:43.9 MB (2.2 MB Compressed download)
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Dimensions:4800 x 3200 px | 40.6 x 27.1 cm | 16 x 10.7 inches | 300dpi
Date taken:30 May 2009
Location:Blue John Cavern-Cross St, Castleton, Hope Valley S33 8WH
Blue John Cavern-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 workings, where it is found in veins in the limestone or loose in the clay beds lining the passageways. Once mined, the lumps of Blue John are washed and transported to the surface. Once in daylight, the quality of the stone can be seen more clearly. The experienced eye of the craftsman can then scan the material for faults and weaknesses. The most solid and attractive pieces are then kept for making into beautiful items of jewellery set in Sterling Silver and 9ct Gold, or for larger ornamental objects such as bowls, sails and candlesticks.