Cornwall’s mining boom (1700s–1900s) extracted tin, copper, and later kaolin (china clay). The industry transformed landscape, economy, and culture. Today, 10+ heritage sites let visitors walk through this history.
What mining terms actually mean (decoded)
Tin mining
Extracting tin ore (cassiterite) from underground shafts. Cornwall was the world’s largest tin producer until the 1800s. The work was dangerous, dark, and paid poorly. By 1900, competition from Malaysia had collapsed the Cornish tin industry.
Copper mining
Similar process, different mineral. Copper mining peaked later (1800–1850) as tin declined. The ores are found at shallower depths than tin, making extraction easier initially.
Kaolin (china clay)
A white clay used to make porcelain and coat paper. Unlike tin and copper (deep underground), kaolin is extracted from surface pits. It dominated the 1900s–present. Today, kaolin mining continues but with mechanisation rather than hand labour.
“Bal”
Cornish word for mine (from “bal” meaning “realm”). You’ll see place names like Poldark (pol = pool, dark = dark), indicating old mine landscapes.
Shaft and adit
A shaft goes straight down; an adit is a horizontal tunnel accessing the mine from a hillside. Adits were preferred where possible (easier access, water drainage).
A heritage sites you can actually visit
Geevor Tin Mine (Penzance area)
What was it? A working tin mine until 1990, the most recently closed major mine in Britain. What can you do? Underground tours (guided) showing shafts worked in the 1980s. The Geevor Tin Mine museum explains the industry’s collapse and the human cost of economic change. Practical info: open daily; tours bookable in advance; £11–15 entry; 2–3 hours including museum time.
Q&A for visitors
Is it safe to explore abandoned mines? No. Many old shafts have unstable walls and ventilation issues. Visit an official heritage site instead, where safety has been assessed.
What happened to miners when the industry collapsed? Mass unemployment (1890–1910s). Many emigrated to Michigan, Australia, or South Africa, where Cornish mining expertise was valued. Families were often separated for years.
How deep did miners go? Tin shafts reached 300–400m below surface. Copper shafts varied. The deepest recorded was Botallack Mine at 500+ metres.
Learn more
Cornwall Mining Heritage Centre. Industrial archaeology guide from English Heritage. Geevor Tin Mine visitor information.
Key takeaway
Cornwall’s mining heritage is preserved not as nostalgia but as honest history of innovation, danger, community, and economic collapse. Visiting these sites teaches that story.