Under the name Grambler and St Aubyn, the mines produced 8,450 tons of copper ore and 54 tons of black tin. From 1871 to 1893, St Aubyn United mines raised 1,390 tons of 6.5% copper ore, 43 tons of black tin and about 300 tons of fluorite.
References
- Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, pp. 395-397.
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