Mining in the area was first recorded in 1674, with many of the lodes being discovered during this period. It wasn’t until 1835 when Morvah and Zennor Tin Mines was first formed, although this covered a larger section of mines than just Carn Galver. This venture was fairly successful and good tin and copper prices led to a small boom. The following year, need for repair work led to delays in production and two accidents. In 1840 the mine closed and equipment was put up for sale. 

In 1850 a new company was started under the name Carn Galver. Old shafts were deepened and an old adit was improved to stretch from Porthmoina Cove to the main shafts. 1855 saw the mine suffer from ventilation problems and the adit had to be abandoned. This was soon fixed following the installation of a ‘Hydro Pneumatic Box’ which provided excellent results.
In 1857 a new sett was granted. The following year a new underground engine was installed to drain the bottom levels of the mine, however water shortages above ground, especially during the summer months led to increased costs. However, profits were good and the mine was able to pay off its debts and continue exploration. High tin prices also allowed for the installation of a new dressing floor.