Keyword: silica

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  • Purification
  • Silica silos
  • chalcedony-agate-IMG rock-2
  • J. M. Trout, Fire Sand Quarries, Landisville, Pennsylvania, ca. 1890s
  • Drying room
  • Drying room
  • Cave entrance
  • Ruined Brickworks
  • Ruined Brickworks
  • Ruined Brickworks
  • Brickworks Kiln
  • Brickworks Kiln
  • Brickworks Kiln
  • Brickworks Kiln
  • Ruined Brickworks
  • Silica Mine
  • Silica Mine
  • Silica Mine
  • Coal level
  • Bull quartz
  • Bull quartz
  • Furlong Mills
  • Furlong Mills, Burslem
  • Furlong Mills
  • Birkhill Fireclay Mine
  • Intrepid Explorers!
  • Exit
  • Bits and pieces
  • Rock fall
  • The broken gate
  • Bricks and pipes
  • More floods
  • Extra support
  • Light entering the mines
  • Shafts of light
  • Winding cable
  • The pulley
  • Mine entrances
  • Dinas Rock
  • The way in
  • Flooded
  • Alcoves
  • Winding post
  • Supporting pillars
  • When double-glazing explodes!
  • Silica Sand
  • Silica Sand