Cornish Metals’ $210M South Crofty funding: capex and restart lens for mine planners
Reviewed by Joe Ashwell

First reported on MINING.com
30 Second Briefing
Cornish Metals has secured a $210 million, six-year bond at a fixed 13.5% coupon to advance the restart of the South Crofty tin mine in Cornwall, with CEO Don Turvey saying the company expects to be fully funded ahead of a final investment decision this summer. The move follows a non-binding US EXIM Bank letter of interest for up to $225 million linked to future tin concentrate exports and comes as tin prices approach $54,000/t after gains of almost 40% in 2025 and 34% year-to-date. South Crofty hosts 2.9 Mt indicated at 1.5% Sn and 2.63 Mt inferred at 1.42% Sn, with a PEA outlining a 14-year life and average output of 4,700 t/y tin, peaking at 5,000 t in year four.
Technical Brief
- Six-year bonds are structured with a fixed 13.5% annual coupon, locking in high-cost debt servicing.
- Investor demand came from Europe, North America and other international markets, diversifying funding exposure.
- US EXIM Bank’s non-binding letter of interest is for up to $225 million of export-linked debt.
- South Crofty previously operated for over 400 years before closure in 1998 due to low tin prices.
- Cornish Metals acquired South Crofty in 2016 after multiple unsuccessful revival attempts by other operators.
- Current resource includes 2.9 Mt indicated at 1.5% Sn and 2.63 Mt inferred at 1.42% Sn.
- Near-mine exploration target is 6–13 Mt grading 0.5–1.8% Sn, offering substantial upside to mine planning.
- Tin prices have risen ~40% in 2025 plus 34% year-to-date, approaching $54,000/t, materially improving project economics.
Our Take
US Export-Import Bank appears repeatedly in our recent mining coverage, backing or assessing projects from Cornish Metals’ South Crofty to McEwen Copper’s large copper-gold build in Argentina and Highland Copper’s US projects, signalling that EXIM is becoming a central financier for Western-aligned critical mineral supply chains.
With South Crofty’s indicated tin grades around 1.5%, the project sits at the higher end of underground tin grades in our database, which should give Cornish Metals more resilience if tin prices retrace from the roughly 34–40% gains noted for this year and 2025.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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