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Summary
DescriptionBlue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 02.JPG
English: After impregnation with epoxy resin, pieces of Blue John at Treak Cliff Cavern, Derbyshire, England, are cut on a circular saw.They may be made into cuboids, for turning as bowls and vases, or flat slices, for making jewellery.
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