Petra Mine, operational from 1953 to 1966, had one of the largest deposits in the region, with 290,000 tons extracted during its operation.
Located about 2.5 kilometres east of the Platies mine. The deposit had a volume of about 500.000 tones with an average content of 1.5% in copper and 40% in sulphur. Mining activity started in 1953 -at a depth of about 50 meters -and ended in 1966. A total of 290,000 tones of ore were dug out of the Petra mine.
Mavridia was the first mine in the Kalavasos area where modern mining began in 1937.
Historically, this area also saw intensive mining during ancient times, as proven by the large accumulations of rust found in the region.
Mavri Sykia, active during both ancient and modern periods, was a key site for copper extraction.