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Volcanic Blue Hone Rock

The only location in the world still mining the volcanic blue hone rock that produces curling stones is at the Trefor Quarry, above the village of Llanaelhaeran overlooking Caernarfon Bay, on the Lleyn Peninsular in North Wales.

Above the remote village is a range of three tall peaks, Tre Ceiri is the tallest in the Eifil range, and the best example of a Neolithic hill fort in the whole of Europe. Garn For is the smallest peak and is the source of the stones. Lower down the steep hillside overlooking the sea below is Nant Y Gwytheyrn, a residential Welsh language school that offers intensive residential courses throughout the year to adults from around the world. September 2017 hiking in the Tre Ceiri Range.

Image of disused miners cabin by Blake Darst, Wenonah Creates.

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