Tynebottom Mine Reveals Cave Pearls and Cobalt Colours
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- Tynebottom Mine in the North Pennines is an abandoned lead mine whose entrance is hidden by willow, ferns, and field rush; inside, a long arched-stonework adit is streaked with vivid mineral colours — orange iron staining, raspberry-pink cobalt traces, elephant-hide greys, and sulphurous yellows.
- Soda-straw stalactites line the roof — hollow tubes formed when central water drops deposit calcium carbonate around each tube's rim.
- Honey-fungus rhizomorphs that once grew on decaying pit props and ladders have been entombed by mineral-saturated water into calcified tangles resembling stone roots.
- Cave pearls — shiny ivory pebbles sitting in a cupped nest — form drip by drip as calcium encloses a grain of sand, with the small vibration of each impact keeping them from adhering to the surface.
- Two miners from Nenthead mines led a small group of potters and artists through Tynebottom toward an exhibition inspired by lead mining in the North Pennines.
- The author emerged wet through the flooded adit, then made drawings of the cave pearls at home — documenting their shallow folds, faintest honey-on-chalky-white colouring, and varied shapes, from egg-shaped to delicately fluted.
Why it matters: A small group of potters and artists — led by two Nenthead miners through Tynebottom's overgrown entrance — are building an exhibition around the mine's cave pearls, soda-straw stalactites, and cobalt-tinged stone, meaning the site's hidden geology becomes direct artistic source material rather than a distant subject of study.
