Trebisken Mine / Trebisken Green

Trebisken was a mine in the Cubert district, south of the village. References associate it with lead and silver, followed by a later return for black tin in 1861. “Black tin” means a concentrate of tin-bearing ore, rather than a dark-coloured finished metal.

That changing mineral story matters. A Cornish mine did not necessarily produce one commodity throughout its life, and later operators might find value in ground or material earlier workers had left behind.

Trebisken belongs to the inland group behind Holywell’s better-known coastal mines. Its separate location helps make sense of the density of workings around Cubert: Ellenglaze, Trerew and the Penhale coast should not be bundled into one vague “Holywell mine”.

50.371699, -5.115815 · Position source: https://webapps.bgs.ac.uk/memoirs/docs/B01793.html

Historic mine locality from the Geological Survey grid [SW 78535 57065]; not a surveyed shaft or visitor entrance