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- Germany , Mayen , slate mine Bausberg II
- Germany , Mayen , slate mine Glückauf
- Germany , Mayen , slate mine Katzenberg
- Germany , Nettesürsch , slate mine Margareta
- Germany , Nuttlar , slate mine
- Ireland , Valencia Island , slate quarry
- Luxembourg , Martelange , slate mine
- Luxembourg , Martelange , slate mine
- Wales (GB) , Llanberis , slate quarries
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