Geology Wonders on Instagram: "The amazing “Blue Mine”, so called for the level around 120ft below the surface full of blue copper related mineral formations. Built up over the years since the mine closed (1850’s mine) by water pushing out tiny amounts of fine minerals in the surrounding rocks, depositing them into the level. These formations are soft like toothpaste and very delicate. Credits @CornishMineExplorer (Facebook)"
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