Awesome blue copper deposits, deep within a Cornish copper mine.

This is just one small section of Tresavean copper mine in Cornwall which was one of the largest copper mines in the area. The mine was worked from the early 1800s right up until the 1920s and was the second deepest mine in Cornwall after Dolcoath. This well hidden section contains some tunnels with some very impressive copper deposits on the rocks, caused by groundwater leaking down through the copper rich bedrock and depositing the minerals within the void space of the mine tunnels.